maurizio71
Posts: 1
Joined: Tue Apr 21, 2015 7:51 pm

Re: Setting up HDMI output when video output isn't what you

Wed Apr 22, 2015 9:48 pm

Hello,
I can not in any way to display the signal in my Samsung TV, I tried more than 20 configurations but without result.

ps. with Raspberry I also bought the SD card with Noobs and everything worked properly, since I changed "SO" are no longer able to view the image even putting the Noobs


below specifications:

SO = Raspbian 3.18

edidparser edid.dat

Code: Select all

Enabling fuzzy format match...
Parsing edid.dat...
HDMI:EDID version 1.3, 1 extensions, screen size 16x9 cm
HDMI:EDID features - videodef 0x80 !standby !suspend !active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF
HDMI:EDID found monitor range descriptor tag 0xfd
HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0
HDMI:EDID monitor range: vertical is 23-61 Hz, horizontal is 26-68 kHz, max pixel clock is 230 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is SAMSUNG
HDMI:EDID found preferred CEA detail timing format: 1920x1080p @ 60 Hz (16)
HDMI:EDID found CEA detail timing format: 1280x720p @ 60 Hz (4)
HDMI:EDID established timing I/II bytes are 20 00 00
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz in established timing I/II
HDMI:EDID standard timings block x 8: 0x0101 0101 0101 0101 0101 0101 0101 0101
HDMI:EDID parsing v3 CEA extension 0
HDMI:EDID monitor support - underscan IT formats:no, basic audio:yes, yuv444:yes, yuv422:yes, #native DTD:1
HDMI:EDID found CEA detail timing format: 1280x720p @ 50 Hz (19)
HDMI:EDID found CEA detail timing format: 1920x1080i @ 60 Hz (5)
HDMI:EDID found CEA detail timing format: 1920x1080i @ 50 Hz (20)
HDMI:EDID found CEA detail timing format: 720x480p @ 60 Hz (2)
HDMI:EDID found CEA format: code 16, 1920x1080p @ 60Hz (native)
HDMI:EDID found CEA format: code 31, 1920x1080p @ 50Hz
HDMI:EDID found CEA format: code 4, 1280x720p @ 60Hz
HDMI:EDID found CEA format: code 19, 1280x720p @ 50Hz
HDMI:EDID found CEA format: code 5, 1920x1080i @ 60Hz
HDMI:EDID found CEA format: code 20, 1920x1080i @ 50Hz
HDMI:EDID found CEA format: code 3, 720x480p @ 60Hz
HDMI:EDID found CEA format: code 18, 720x576p @ 50Hz
HDMI:EDID found CEA format: code 32, 1920x1080p @ 24Hz
HDMI:EDID found CEA format: code 33, 1920x1080p @ 25Hz
HDMI:EDID found CEA format: code 34, 1920x1080p @ 30Hz
HDMI:EDID found audio format 2 channels PCM, sample rate: 32|44|48 kHz, sample size: 16|20|24 bits
HDMI:EDID found Video Capability DB length 2
HDMI:EDID video capability: CE:3 IT:3 PT:0 QS:0
HDMI:EDID extended data block tag 0x05 length 3 not supported
HDMI:EDID found HDMI VSDB length 7
HDMI:EDID HDMI VSDB has physical address 4.0.0.0
HDMI:EDID HDMI VSDB supports AI:yes, dual link DVI:no
HDMI:EDID HDMI VSDB deep colour support - 48-bit:no 36-bit:yes 30-bit:yes DC_yuv444:yes
HDMI:EDID HDMI VSDB max TMDS clock 225 MHz
HDMI:EDID HDMI VSDB has no latency information
HDMI:EDID adding mandatory support for CEA (1) 640x480p @ 60Hz
HDMI:EDID adding mandatory support for CEA (17) 720x576p @ 50Hz
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID best score mode initialised to CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 0)
HDMI:EDID best score mode is now CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 61864)
HDMI:EDID best score mode is now CEA (2) 720x480p @ 60 Hz with pixel clock 27 MHz (score 2566472)
HDMI:EDID CEA mode (3) 720x480p @ 60 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID best score mode is now CEA (4) 1280x720p @ 60 Hz with pixel clock 74 MHz (score 4635592)
HDMI:EDID DMT mode (4) 640x480p @ 60 Hz with pixel clock 25 MHz has a score of 18432
HDMI:EDID CEA mode (5) 1920x1080i @ 60 Hz with pixel clock 74 MHz has a score of 3773832
HDMI:EDID best score mode is now CEA (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz (score 5398248)
HDMI:EDID CEA mode (17) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (18) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (19) 1280x720p @ 50 Hz with pixel clock 74 MHz has a score of 4117160
HDMI:EDID CEA mode (20) 1920x1080i @ 50 Hz with pixel clock 74 MHz has a score of 3232360
HDMI:EDID CEA mode (31) 1920x1080p @ 50 Hz with pixel clock 148 MHz has a score of 232360
HDMI:EDID CEA mode (32) 1920x1080p @ 24 Hz with pixel clock 74 MHz has a score of 124532
HDMI:EDID CEA mode (33) 1920x1080p @ 25 Hz with pixel clock 74 MHz has a score of 128680
HDMI:EDID CEA mode (34) 1920x1080p @ 30 Hz with pixel clock 74 MHz has a score of 149416
HDMI:EDID preferred mode remained as CEA (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz
HDMI:EDID has HDMI support and audio support
edid_parser exited with code 0

tvservice -m CEA

Code: Select all

Group CEA has 14 modes:
           mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive
           mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive
           mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
           mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced
  (native) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
           mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive
           mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive
           mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive
           mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced
           mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
           mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive
           mode 33: 1920x1080 @ 25Hz 16:9, clock:74MHz progressive
           mode 34: 1920x1080 @ 30Hz 16:9, clock:74MHz progressive
tvservice -m DMT

Code: Select all

Group DMT has 2 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
  (prefer) mode 82: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
tvservice -s

Code: Select all

state 0x12001a [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive
/boot/config.txt

Code: Select all

disable_overscan=1
hdmi_force_hotplug=1
hdmi_group=1
hdmi_mode=16

thanks for any advice and sorry for the English but Google is my friend

fredsim
Posts: 1
Joined: Sat May 02, 2015 7:13 am

Re: Setting up HDMI output when video output isn't what you

Sat May 02, 2015 7:47 am

Dear Group,
As I am a newbie here, I hope not to offend anyone if I my questions had been answered before or if it belong to a different topic? Thanks in advance for any help, advice or pointers.

Problem 1: I get a black screen on my Monitor (Samsung SyncMaster 223BW) eventhough my Raspberry Pi starts up correctly. The connection is HDMI cable -> HDMI to DVI-D adapter. I have tried all kind of changes to the config.txt file including config_hdmi_boost=7. This could be the cause for my Problem 2.

Problem 2: Connected to a TV via HDMI and it works fine (full resolution) without any hdmi configuration in the config.txt initially until I start testing it with my Monitor. Now I have to configure it with hdmi_group and hdmi_mode or else it will just display 640x480 resolution.

Setup: Raspberry Pi 2 | Boot using Bootberry | Raspbian (believe up-to-date as I had run all rpi-update, apt-get update, apt-get upgrade)

After spending a couple of days troubleshooting, I suspect that my RPi might not be detecting my EDID from Monitor or TV after all the plugging and unplugging of my HDMI cable to the Monitor (hot swap while still powered-on a couple of times, till I read that it might be dangerous to do that). When I run 'tvservice -n' the output is 'No device present'. I had also tried this with multiple different HDMI cables and TVs. It can no longer display full resolution as before, hence I suspect either something in my Raspberry Pi 2 had changed or potentially hardware malfunction? Thank you for your help.

MirkoB82
Posts: 7
Joined: Tue May 05, 2015 3:09 pm

Re: Setting up HDMI output when video output isn't what you

Tue May 05, 2015 3:14 pm

Hi,

i just bought my new Raspberry Pi 2 Model B, and it seems to work correctly on my TV. Unfortunately, when i run my KODI installation, i only get "Unsupported Mode" on TV and screen gets black.

Is there a way to fix this? what mode should i select in config?
I have a SAMSUNG LCD 32" display, and it works correctly with my Mac when i connect it with miniDVI-to-HDMI cable..

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Tue May 19, 2015 3:42 pm

Spent about 6 hours now trying to get the Pi 2 running on an LG screen. Previous to this we had a Pi Model A+ connected with no problem but I can't for the life of me get the display settings right.

The screen is an LG 42LV355C-ZB.

The screen does display with hdmi_safe=1 although obviously it's tiny. Below is the output of tvservice --dumpedid/edidparser, although I've tried all of the settings this suggests, including framebuffer_width, framebuffer_height, hdmi_group and hdmi_mode.

The result of tvservice --dumpedid is below. Any ideas of settings in config.txt to try?

Thanks!

Code: Select all

Enabling fuzzy format match...
Parsing /tmp/edid...
HDMI:EDID version 1.3, 1 extensions, screen size 16x9 cm
HDMI:EDID features - videodef 0x80 !standby !suspend !active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF
HDMI:EDID found monitor range descriptor tag 0xfd
HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0
HDMI:EDID monitor range: vertical is 58-62 Hz, horizontal is 30-83 kHz, max pixel clock is 160 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is LG_TV
HDMI:EDID found preferred CEA detail timing format: 1920x1080p @ 60 Hz (16)
HDMI:EDID failed to find a matching detail format for 1360x768p hfp:72 hs:136 hbp:208 vfp:3 vs:5 vbp:22 pixel clock:84 MHz
HDMI:EDID calculated refresh rate is 60 Hz
HDMI:EDID guessing the format to be 1360x768p @60 Hz
HDMI:EDID found DMT detail timing format: 1360x768p @ 60 Hz (39)
HDMI:EDID established timing I/II bytes are A1 08 00
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 9, 800x600p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 16, 1024x768p @ 60 Hz in established timing I/II
HDMI:EDID standard timings block x 8: 0x714F 8180 0101 0101 0101 0101 0101 0101 
HDMI:EDID found DMT format: code 21, 1152x864p @ 75 Hz (4:3) in standard timing 0
HDMI:EDID found DMT format: code 35, 1280x1024p @ 60 Hz (5:4) in standard timing 1
HDMI:EDID parsing v3 CEA extension 0
HDMI:EDID monitor support - underscan IT formats:yes, basic audio:yes, yuv444:yes, yuv422:yes, #native DTD:1
HDMI:EDID found CEA detail timing format: 1920x1080i @ 60 Hz (5)
HDMI:EDID found CEA detail timing format: 1280x720p @ 60 Hz (4)
HDMI:EDID found CEA detail timing format: 1920x1080p @ 60 Hz (16)
HDMI:EDID found CEA detail timing format: 1280x720p @ 50 Hz (19)
HDMI:EDID found CEA format: code 16, 1920x1080p @ 60Hz 
HDMI:EDID found CEA format: code 31, 1920x1080p @ 50Hz 
HDMI:EDID found CEA format: code 4, 1280x720p @ 60Hz (native)
HDMI:EDID found CEA format: code 19, 1280x720p @ 50Hz 
HDMI:EDID found CEA format: code 5, 1920x1080i @ 60Hz 
HDMI:EDID found CEA format: code 20, 1920x1080i @ 50Hz 
HDMI:EDID found CEA format: code 3, 720x480p @ 60Hz 
HDMI:EDID found CEA format: code 2, 720x480p @ 60Hz 
HDMI:EDID found CEA format: code 18, 720x576p @ 50Hz 
HDMI:EDID found CEA format: code 32, 1920x1080p @ 24Hz 
HDMI:EDID found CEA format: code 33, 1920x1080p @ 25Hz 
HDMI:EDID found CEA format: code 34, 1920x1080p @ 30Hz 
HDMI:EDID found CEA format: code 21, 1440x576i @ 50Hz 
HDMI:EDID found CEA format: code 1, 640x480p @ 60Hz 
HDMI:EDID found audio format 6 channels AC3, sample rate: 32|44|48 kHz, bitrate: 640 kbps
HDMI:EDID found audio format 2 channels PCM, sample rate: 32|44|48|96|192 kHz, sample size: 16|20|24 bits
HDMI:EDID found HDMI VSDB length 7
HDMI:EDID HDMI VSDB has physical address 1.0.0.0
HDMI:EDID HDMI VSDB supports AI:yes, dual link DVI:no
HDMI:EDID HDMI VSDB deep colour support - 48-bit:no 36-bit:yes 30-bit:yes DC_yuv444:yes
HDMI:EDID HDMI VSDB max TMDS clock 225 MHz
HDMI:EDID HDMI VSDB has no latency information
HDMI:EDID extended data block tag 0x05 length 3 not supported
HDMI:EDID adding mandatory support for CEA (17) 720x576p @ 50Hz
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID best score mode initialised to CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 0)
HDMI:EDID best score mode is now CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 61864)
HDMI:EDID best score mode is now CEA (2) 720x480p @ 60 Hz with pixel clock 27 MHz (score 66472)
HDMI:EDID CEA mode (3) 720x480p @ 60 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID best score mode is now CEA (4) 1280x720p @ 60 Hz with pixel clock 74 MHz (score 3690888)
HDMI:EDID DMT mode (4) 640x480p @ 60 Hz with pixel clock 25 MHz has a score of 18432
HDMI:EDID best score mode is now CEA (5) 1920x1080i @ 60 Hz with pixel clock 74 MHz (score 4273832)
HDMI:EDID DMT mode (9) 800x600p @ 60 Hz with pixel clock 40 MHz has a score of 28800
HDMI:EDID best score mode is now CEA (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz (score 5398248)
HDMI:EDID DMT mode (16) 1024x768p @ 60 Hz with pixel clock 65 MHz has a score of 47185
HDMI:EDID CEA mode (17) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (18) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 66472
HDMI:EDID CEA mode (19) 1280x720p @ 50 Hz with pixel clock 74 MHz has a score of 2617160
HDMI:EDID CEA mode (20) 1920x1080i @ 50 Hz with pixel clock 74 MHz has a score of 128680
HDMI:EDID CEA mode (21) 1440x576i @ 50 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID DMT mode (21) 1152x864p @ 75 Hz with pixel clock 108 MHz has a score of 99649
HDMI:EDID CEA mode (31) 1920x1080p @ 50 Hz with pixel clock 148 MHz has a score of 232360
HDMI:EDID CEA mode (32) 1920x1080p @ 24 Hz with pixel clock 74 MHz has a score of 124532
HDMI:EDID CEA mode (33) 1920x1080p @ 25 Hz with pixel clock 74 MHz has a score of 128680
HDMI:EDID CEA mode (34) 1920x1080p @ 30 Hz with pixel clock 74 MHz has a score of 149416
HDMI:EDID DMT mode (35) 1280x1024p @ 60 Hz with pixel clock 108 MHz has a score of 103643
HDMI:EDID DMT mode (39) 1360x768p @ 60 Hz with pixel clock 85 MHz has a score of 4562668
HDMI:EDID preferred mode remained as CEA (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz
HDMI:EDID has HDMI support and audio support
edid_parser exited with code 0

User avatar
DougieLawson
Posts: 37083
Joined: Sun Jun 16, 2013 11:19 pm
Location: Basingstoke, UK
Contact: Website Twitter

Re: Setting up HDMI output when video output isn't what you

Tue May 19, 2015 6:54 pm

I'd start with

Code: Select all

hdmi_group=1
hdmi_mode=16
in the config.txt that you get to by holding [SHIFT] during boot.
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.

Any DMs sent on Twitter will be answered next month.

This is a doctor free zone.

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Tue May 19, 2015 9:23 pm

DougieLawson wrote:I'd start with

Code: Select all

hdmi_group=1
hdmi_mode=16
in the config.txt that you get to by holding [SHIFT] during boot.
Yeah, I've tried that. :/ It displays fine on another monitor but 'no signal' for the LG screen. Have also tried to boost the HDMI signal.

Starting to think I should just get an HDMI to VGA adapter!

User avatar
DougieLawson
Posts: 37083
Joined: Sun Jun 16, 2013 11:19 pm
Location: Basingstoke, UK
Contact: Website Twitter

Re: Setting up HDMI output when video output isn't what you

Tue May 19, 2015 9:28 pm

What does
tvservice -m CEA && tvservice -m DMT
give you when the LG TV is connected?
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.

Any DMs sent on Twitter will be answered next month.

This is a doctor free zone.

myoung008
Posts: 55
Joined: Mon Mar 18, 2013 9:56 pm

Re: Setting up HDMI output when video output isn't what you

Tue May 19, 2015 9:46 pm

This is from my own experience, YMMV. Not all of these issues were exclusive to Rpi, but all did show up with a pi at one point or another.

Samsung displays: Flash new firmware from the Samsung website if it's available for your monitor (you'll need a Windows machine temporarily for that). Fixed two different models this way. Fixes black screen, and repetitive sync issues (image appears briefly, then goes black for 2-3 seconds trying to resync).

LG displays: They seem to be especially finicky with the thin HDMI cables. Recently had four identical 27" monitors with three different issues. Another 25" had intermittent sync issues similar to the Samsung issue described above. After talking with LG tech support tried the thicker-style HDMI cables, and all issues are fixed.

I've not had any problem with DVI adapters or DVI-HDMI cables, except in conjunction with one of the above issues.

Hope this helps.

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 12:39 pm

DougieLawson wrote:What does
tvservice -m CEA && tvservice -m DMT
give you when the LG TV is connected?
Hi, it yields:

Code: Select all

Group CEA has 13 modes:
           mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
           mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive 
           mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive 
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive 
  (native) mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced 
           mode 6: 720x480 @ 60Hz 4:3, clock:27MHz x2 interlaced 
           mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 
           mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive 
           mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive 
           mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive 
           mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced 
           mode 21: 720x576 @ 50Hz 4:3, clock:27MHz x2 interlaced 
           mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive 

Code: Select all

Group DMT has 12 modes:
  (prefer) mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
           mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive 
           mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive 
           mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive 
           mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive 
           mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive 
           mode 32: 1280x960 @ 60Hz 4:3, clock:108MHz progressive 
           mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive 
           mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive 
           mode 51: 1600x1200 @ 60Hz 4:3, clock:162MHz progressive 
           mode 58: 1680x1050 @ 60Hz 16:10, clock:146MHz progressive 
           mode 68: 1920x1200 @ 60Hz 16:10, clock:154MHz progressive 

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 12:41 pm

myoung008 wrote:LG displays: They seem to be especially finicky with the thin HDMI cables. Recently had four identical 27" monitors with three different issues. Another 25" had intermittent sync issues similar to the Samsung issue described above. After talking with LG tech support tried the thicker-style HDMI cables, and all issues are fixed.
I thought that might be an issue, although I've tried a couple of cables and the one in there (it's routed through the floor, up the inside of a wall and out the ceiling) is a heavy one too. I thought that the cable might be too long, but I've tried a shorter one that works well with a Pi and I get the same.

User avatar
DougieLawson
Posts: 37083
Joined: Sun Jun 16, 2013 11:19 pm
Location: Basingstoke, UK
Contact: Website Twitter

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 2:50 pm

I'd go with the HDMI cable not being up to spec option. Can you try your cables with any other HDMI device?

Your TV is reporting plenty of modes including a few at 1080p, so there's no software reason why it shouldn't work.

Have you tried the config_hdmi_boost=n # where n=1 to 7 in config.txt?
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.

Any DMs sent on Twitter will be answered next month.

This is a doctor free zone.

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 4:29 pm

DougieLawson wrote:I'd go with the HDMI cable not being up to spec option. Can you try your cables with any other HDMI device?
I've tried another cable which I bought specifically for the Pi which is usually bomb-proof but no luck. :/
DougieLawson wrote:IHave you tried the config_hdmi_boost=n # where n=1 to 7 in config.txt?
I've tried config_hdmi_boost up to 6 but no luck yet.

When the 1080p is being reported as the height, does this equate to framebuffer_height=1080 ? Just wondering if there was a difference between 1080p and 1080i.

I'm a bit stuck...not really sure what else to try now. It's doubly frustrating as the Pi 1 works, although that's often the case when you get better hardware than older, more clunky stuff stops working.

I've manually run through all of the hdmi modes from 1 to 35 in group 1. Mode 1, 17 and 22 work, although these are at low resolution. I can however set the mode to 1 and the framebuffer size to a larger resolution which stretches the screen although obviously at the expense of sharpness.

So, in theory, if I tried:

Code: Select all

hdmi_force_hotplug=1 
config_hdmi_boost=4
hdmi_group=1
hdmi_mode=16
framebuffer_width=1920
framebuffer_height=1080
disable_overscan=0
...this should work ok, based upon the output of tvservice --dumpedid?

myoung008
Posts: 55
Joined: Mon Mar 18, 2013 9:56 pm

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 4:50 pm

While I've not had firmware issues with LG, it's worth a shot. There is an update available for your model.

http://www.lg.com/uk/support-product/lg-42LV355C#

I have one 25' cable in place right now with LG (one of the replacements with no issues). Somewhere around here I have a 50' I could try... when I find it.

User avatar
DougieLawson
Posts: 37083
Joined: Sun Jun 16, 2013 11:19 pm
Location: Basingstoke, UK
Contact: Website Twitter

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 5:13 pm

Try setting hdmi_mode=31 and hdmi_group=1

Code: Select all

 mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
Note: Having anything humorous in your signature is completely banned on this forum. Wear a tin-foil hat and you'll get a ban.

Any DMs sent on Twitter will be answered next month.

This is a doctor free zone.

myoung008
Posts: 55
Joined: Mon Mar 18, 2013 9:56 pm

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 5:52 pm

Ok, found the 50' cable and did some tests. This is all on Gentoo on Pi2, stock Raspbian kernel 3.18.7-v7+. Tried all tests on both fb console and KDE5 on X11 using manually compiled fbturbo driver. There's nothing HDMI related in my config.txt, the only lines are disable_overscan=1 and gpu_mem=16 (this is usually a headless or cli-only build box).

5 different hdmi cables. All 5 displayed 1080p successfully. The 3' cable was to my 25" LG monitor, the others to one of the 27" finicky ones.

The "Detection" issue listed below is where the monitors display okay, but power off on any loss of signal instead of powersave mode that will return automatically with signal. This only happens for me on the 27" LG. Happens regardless of source; rpi or my main x86-64 workstation.

3' Coboc thin cable - no problems, though generally the longer versions of this cable caused detection problem on 27" LG.
12' Visio thick cable - no problems - I've been using these as my "bulletproof" cables.
25' Insten thick cable - no problems
25' Insten thick cable - identical to the other 25' cable, but this one had random flickering pixels in both fbcon and X11.
50' Insten thick cable "with Ethernet" - detection issue

All that to show that all cables are not created the same. Thin vs Thick was never meant to be scientific, just as a general idea of cable capability/quality. The Insten 25' with the flickering pixels was brand new in the package a half hour ago.

I'd first try the solution by DougieLawson, then the TV firmware update from my last post. After that maybe try a third or fourth cable? Maybe it's a hardware issue -- the HDMI out on your Pi2 is flaky? Do you have another Pi2 to test?

JarJarGeek
Posts: 48
Joined: Tue Mar 18, 2014 11:32 am

Re: Setting up HDMI output when video output isn't what you

Wed May 20, 2015 8:26 pm

OK - some good advice her but with the plethora of screens and monitors available - there's a lot of 'suck it and see' to be done. I have been trying to get a 'universal setup' going for the school I work in - unfortunately furbished with a load of [email protected]#py VGA's , all of various makes and ages - few capable of HD. So armed with the fury of a thousand suns, strong coffee and some VGA adapters I set to work on the /boot/config.txt in pursuit of the holy grail. I'm using the B+ in school loaded with the latest wheezy / astro-pi distro , a choice of 2 different adapters and a selection of 3rd rate monitors , few capable of HD. I did come up with a combo that now works on 3 different makes of monitors & 2 different VGA adapters - this with some 'black space' on a few of them. So after a few hashtag expletive deletives here's the full script; I've highlighted my changes - use at own risk;

# For more options and information see
# http://www.raspberrypi.org/documentatio ... fig-txt.md
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
framebuffer_width=1280
framebuffer_height=960


# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=2
#hdmi_mode=36

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
arm_freq=1000

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

start_x=1
gpu_mem=128
core_freq=500
sdram_freq=500
over_voltage=2
dtparam=i2c_arm=on
dtoverlay=rpi-sense
dtparam=i2c_arm=on
dtoverlay=rpi-sense
@jarjargeek

syntax-err0r.com

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Thu May 21, 2015 10:40 am

myoung008 wrote:While I've not had firmware issues with LG, it's worth a shot. There is an update available for your model.
I've downloaded the update, put it on a FAT32 USB key in a LG_DTV directory, plugged it into the TV and it mounts the USB stick but it just displays a menu with photos, videos or music, not the firmware update. I'm trying a factory reset now though. Bit frustrating, this is. :)
DougieLawson wrote:Try setting hdmi_mode=31 and hdmi_group=1

Code: Select all

 mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
No luck with that either, unfortunately. :(

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Thu May 21, 2015 11:14 am

Ok...I've given up...I bought an HDMI to VGA adapter so I'm hoping that'll work.

Life's a bit too short to spend it dealing with difficult televisions. ;)

0iracul
Posts: 1
Joined: Sun May 24, 2015 5:18 pm

RPi doesn't select correct video mode

Sun May 24, 2015 5:36 pm

Hi, I'm new to the Raspberry Pi.

I've a little bit of a problem with the detection of the automatic resolution for the video output.
The first post in this thread says:
Gert van Loo wrote:edidparser outputs the list of formats supported in EDID include formats not supported in Raspberry Pi, and it will show you which formats are filtered out. At the end of the output it will show which format is chosen as default. edidparser is the internal EDID parsing code of Raspberry Pi with a command line front end.
The output of edidparser is the following:

Code: Select all

Enabling fuzzy format match...
Parsing edid...
HDMI:EDID version 1.3, 0 extensions, screen size 34x27 cm
HDMI:EDID features - videodef 0x80 !standby !suspend active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF
HDMI:EDID found monitor S/N descriptor tag 0xff
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is Philips_17S4
HDMI:EDID found monitor range descriptor tag 0xfd
HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0
HDMI:EDID monitor range: vertical is 56-76 Hz, horizontal is 30-83 kHz, max pixel clock is 140 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found preferred DMT detail timing format: 1280x1024p @ 60 Hz (35)
HDMI:EDID established timing I/II bytes are BD 4B 00
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 5, 640x480p @ 72 Hz in established timing I/II
HDMI:EDID found DMT format: code 6, 640x480p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 9, 800x600p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 11, 800x600p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 16, 1024x768p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 18, 1024x768p @ 75 Hz in established timing I/II
HDMI:EDID found DMT format: code 36, 1280x1024p @ 75 Hz in established timing I/II
HDMI:EDID standard timings block x 8: 0x8180 81C0 8140 0101 0101 0101 0101 0101 
HDMI:EDID found DMT format: code 35, 1280x1024p @ 60 Hz (5:4) in standard timing 0
HDMI:EDID found DMT format: code 85, 1280x720p @ 60 Hz (16:9) in standard timing 1
HDMI:EDID found DMT format: code 32, 1280x960p @ 60 Hz (4:3) in standard timing 2
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID best score mode initialised to DMT (4) 640x480p @ 60 Hz with pixel clock 25 MHz (score 0)
HDMI:EDID best score mode is now DMT (4) 640x480p @ 60 Hz with pixel clock 25 MHz (score 36864)
HDMI:EDID best score mode is now DMT (5) 640x480p @ 72 Hz with pixel clock 31 MHz (score 44236)
HDMI:EDID best score mode is now DMT (6) 640x480p @ 75 Hz with pixel clock 31 MHz (score 46080)
HDMI:EDID best score mode is now DMT (9) 800x600p @ 60 Hz with pixel clock 40 MHz (score 57600)
HDMI:EDID best score mode is now DMT (11) 800x600p @ 75 Hz with pixel clock 49 MHz (score 72000)
HDMI:EDID best score mode is now DMT (16) 1024x768p @ 60 Hz with pixel clock 65 MHz (score 94370)
HDMI:EDID best score mode is now DMT (18) 1024x768p @ 75 Hz with pixel clock 78 MHz (score 117964)
HDMI:EDID best score mode is now DMT (32) 1280x960p @ 60 Hz with pixel clock 108 MHz (score 172456)
HDMI:EDID best score mode is now DMT (35) 1280x1024p @ 60 Hz with pixel clock 108 MHz (score 5260929)
HDMI:EDID DMT mode (36) 1280x1024p @ 75 Hz with pixel clock 135 MHz has a score of 196608
HDMI:EDID DMT mode (85) 1280x720p @ 60 Hz with pixel clock 74 MHz has a score of 135592
HDMI:EDID preferred mode remained as DMT (35) 1280x1024p @ 60 Hz with pixel clock 108 MHz
HDMI:EDID has only DVI support and no audio support
edid_parser exited with code 0
The way I read the output, the device should select a resolution of 1280×1024p (mode 35), since it has the highest score. But it doesn't! I only get this mode, if I manually set hdmi_mode=35 in /boot/config.txt.
In case I don't write anything to the file and let the device choose automatically, I only get a 640×480 resolution.

Why does this happen and can I change it? At the moment I have no problem with manually setting the values in config.txt, but maybe I decide to use a different screen in the future and forget that I made this changes, which then leads to confusion…

betandr
Posts: 9
Joined: Tue May 19, 2015 1:17 pm

Re: Setting up HDMI output when video output isn't what you

Thu May 28, 2015 12:20 pm

So, the HDMI to VGA worked...so I'm sticking with that. I suspect it's something spooky with the LG TV's HDMI in, although I've learned from experience that LG TVs often have spooky things... Still, it works in the correct mode and group now so all good! :)

Thanks all...

Yannick88
Posts: 3
Joined: Wed Jun 17, 2015 6:35 am

Re: Setting up HDMI output when video output isn't what you

Fri Jun 19, 2015 11:25 pm

Hello,

I'm using a buildroot distribution on my raspberry pi 2 and I try to display an image on the screen on portrait mode with the package fbv.

My monitor is a 1920x1080 resolution and I try this configuration on my config.txt :

Code: Select all

hdmi_mode=16
hdmi_group=1
gpu_mem=256
display_rotate=1
But when I boot, the screen is displayed only on half of the whole screen.
I see my image of 1080x1920 resolution splitted just on the middle.
If I remove the display_rotate, the whole image of 1920x1080 resolution is displayed.

If I boot a Rasbian with the same config in config.txt, The screen is correctly displayed on portrait mode.

I think I missed a configuration with buildroot but I don't not what is it.
Some one has an idea ?

Thank you.

DBance1
Posts: 4
Joined: Thu Jul 30, 2015 1:02 pm

Re: Setting up HDMI output when video output isn't what you

Thu Jul 30, 2015 1:17 pm

As will become obvious I am new to Raspberry Pi !

I have just connected up my Raspberry Pi and it works with a HDMI enabled monitor. However I have a LG Flatron E2211 monitor that only has a d-sub connector so I purchased a VGA / SVGA to HDMI Cable and guess what it doesn't work. The supplier has suggested that I establish if my - graphic card needs to support "digital signal output through your VGA port" - does it and is the information contained within this post and forum what I require to fix the problem?

Any help greatly received.

User avatar
FTrevorGowen
Forum Moderator
Forum Moderator
Posts: 5335
Joined: Mon Mar 04, 2013 6:12 pm
Location: Bristol, U.K.
Contact: Website

Re: Setting up HDMI output when video output isn't what you

Thu Jul 30, 2015 6:01 pm

DBance1 wrote:As will become obvious I am new to Raspberry Pi !
I have just connected up my Raspberry Pi and it works with a HDMI enabled monitor. However I have a LG Flatron E2211 monitor that only has a d-sub connector so I purchased a VGA / SVGA to HDMI Cable and guess what it doesn't work. The supplier has suggested that I establish if my - graphic card needs to support "digital signal output through your VGA port" - does it and is the information contained within this post and forum what I require to fix the problem?
Any help greatly received.
"Passive" cables will never work (HDMI is "digital", VGA is "analogue") so some form of "active" conversion is needed (hence the supplier's reference to "graphics card support" of "digital signal output through your VGA port" - the Pi neither has a graphics card or a VGA port!) Hence what you need is an active HDMI-to-VGA adapter. FWIW, I've used these two:
http://www.cpmspectrepi.webspace.virgin ... erter.html
http://www.cpmspectrepi.webspace.virgin ... rter2.html
and there are other, similar devices.
Also, again FWIW, some setup notes/guidance can be found in my webpages here:
http://www.cpmspectrepi.webspace.virgin ... GA_Monitor
Trev.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, A+ and a B2) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

DBance1
Posts: 4
Joined: Thu Jul 30, 2015 1:02 pm

Re: Setting up HDMI output when video output isn't what you

Wed Aug 05, 2015 2:50 pm

Trev

Thank you for your original reply, I have now purchased a HDMI to VGA and Audio Converter #2 as you suggested and they have arrived.

I have plugged the converter combination to the ACER HDMI enabled monitor and it works through both the HDMI (straight HDMI to HDMI) and VGA ports, the VGA port worked without any adjustments. I then plugged the converter combination into my LG monitor that only has a VGA port and nothing on the screen.

I noticed in your original reply that you referenced "some setup notes/guidance can be found in my webpages here:
http://www.cpmspectrepi.webspace.virgin ... GA_Monitor..." I have looked at these on my pc and you suggest I need to select settings to get my monitor 'in tune with the RPi'. How do I do that if I cannot see what I'm doing? Can I make the changes with the HDMI enabled monitor connected and save them so that next time I switch on the RPi with the LG monitor attached it will recognise it, or do you have a way to do it that work?

Any help greatly received.

User avatar
FTrevorGowen
Forum Moderator
Forum Moderator
Posts: 5335
Joined: Mon Mar 04, 2013 6:12 pm
Location: Bristol, U.K.
Contact: Website

Re: Setting up HDMI output when video output isn't what you

Wed Aug 05, 2015 8:05 pm

DBance1 wrote:Trev
Thank you for your original reply, I have now purchased a HDMI to VGA and Audio Converter #2 as you suggested and they have arrived.
I have plugged the converter combination to the ACER HDMI enabled monitor and it works through both the HDMI (straight HDMI to HDMI) and VGA ports, the VGA port worked without any adjustments. I then plugged the converter combination into my LG monitor that only has a VGA port and nothing on the screen.
I noticed in your original reply that you referenced "some setup notes/guidance can be found in my webpages here:
http://www.cpmspectrepi.webspace.virgin ... GA_Monitor..." I have looked at these on my pc and you suggest I need to select settings to get my monitor 'in tune with the RPi'. How do I do that if I cannot see what I'm doing? Can I make the changes with the HDMI enabled monitor connected and save them so that next time I switch on the RPi with the LG monitor attached it will recognise it, or do you have a way to do it that work?
Any help greatly received.
W.r.t. "How do I do that if I cannot see what I'm doing? Can I make the changes with the HDMI enabled monitor connected and save them so that next time I switch on the RPi with the LG monitor attached it will recognise it, or do you have a way to do it that work?" :
1) Understood - but there are "workarounds" (usually involving a second computer).
2) Whilst you can make changes - you will not (easily) know what changes to make because you need to know what information about itself the LG monitor is able to "tell a Pi" about its display preferences etc. via the HDMI converter. (Not all VGA "system combinations" pass the relevant DDC data - see link below** for examples)
To be able to provide more detailed help I need to know more about your "general setup" etc.
a) Are you using a NOOBS based install of Raspbian, or a "direct image" (from a *.img file) based method?
b) Do you have access to another computer that can run on the same network as the Pi and, if so, what O.S. do you use on it?
Trev.
** such as simple VGA or KVM switches:
http://www.cpmspectrepi.webspace.virgin ... tches.html
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, A+ and a B2) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

Return to “Troubleshooting”