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ioha
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HDMI does not seem to work

Tue Feb 24, 2015 10:53 am

I do not get any picture on my monitor via HDMI cable.
The screen stays black.

The monitor has only an input for DVI-D and VGA, so I use an adapter HDMI to DVI.

I tried following modifications/configurations (in /boot/config.txt) without any success:
(1) hdmi_force_hotplug=1 and hdmi_drive=2
(2) hdmi_safe=1, config_hdmi_boost=4, hdmi_force_hotplug=1, hdmi_group=2 and hdmi_mode=4

Used hardware and operating system(s):
- Raspberry Pi 1 Model B+
- Raspbian wheezy/Debian 7.8 or openelec 5.0.3

Btw: I'm using the rpi already many months with success for owncloud, dns server, time server etc.
Yesterday was my first try to connect it with my computer monitor.

I would be glad to get the issue fixed with you.
Last edited by ioha on Fri Feb 27, 2015 10:39 pm, edited 2 times in total.
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ioha
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Re: HDMI does not seem to work

Tue Feb 24, 2015 1:00 pm

btw, I ensured that the cable and adapter work with connection between desktop computer and monitor.
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fruitoftheloom
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Re: HDMI does not seem to work

Tue Feb 24, 2015 1:34 pm

ioha wrote:btw, I ensured that the cable and adapter work with connection between desktop computer and monitor.
The convertor is it HDMi to DVi or DVi to HDMi, I went out and bought a quality HDMi to DVi Cable when I had issues.
Retired disgracefully.....
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ioha
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Re: HDMI does not seem to work

Tue Feb 24, 2015 1:40 pm

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drgeoff
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Re: HDMI does not seem to work

Tue Feb 24, 2015 2:35 pm

I realise it is 0.99 probability that you rebooted the RPi after connecting the monitor and making any changes to config.txt. But if the 0.01 applies, try rebooting.

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ioha
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Re: HDMI does not seem to work

Tue Feb 24, 2015 3:06 pm

drgeoff wrote:I realise it is 0.99 probability that you rebooted the RPi after connecting the monitor and making any changes to config.txt. But if the 0.01 applies, try rebooting.
yes, i did after each mentioned try a reboot. :s
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3corey2
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Re: HDMI does not seem to work

Tue Feb 24, 2015 3:28 pm

since you are using a adapter you need a high speed hdmi cable, otherwise it may not function properly. i personally have never used a adapter.
ras pi 2, gotta love it.

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ioha
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Re: HDMI does not seem to work

Tue Feb 24, 2015 4:11 pm

3corey2 wrote:you need a high speed hdmi cable
The mentioned cable is a "certified high speed HDMI cable" and "supports transfer rates up to 18 Gbit/s".
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Re: HDMI does not seem to work

Tue Feb 24, 2015 6:41 pm

3corey2 wrote:since you are using a adapter you need a high speed hdmi cable, otherwise it may not function properly.
On what evidence are you believing that nonsense?

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ioha
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Re: HDMI does not seem to work

Tue Feb 24, 2015 11:38 pm

Any new ideas or suggestions?
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DougieLawson
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Re: HDMI does not seem to work

Tue Feb 24, 2015 11:49 pm

ioha wrote:Any new ideas or suggestions?
Is your RPi running as a bare board or is it in a case? If it's in a case does that stop the plug going all the way into the socket?
Does your HDMI cable work with other video/audio devices?
Have you tried with another TV or monitor?
Have you tried stripping every hdmi & framebuffer parm out of /boot/config.txt then adding one at a time and testing each parm in turn? If you're using NOOBS are you updating the right config (use the NOOBS recovery system to do it)?

If you can ssh in to your RPi what does the tvservice -m DMT command show?
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ioha
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Re: HDMI does not seem to work

Wed Feb 25, 2015 11:20 am

My pi is running in a case. The connectors plugs completely in both sockets (at pi and monitor/adapter) - there is about 1mm space.
The same cable (incl. adapter) works with the connection between my desktop computer and the monitor (mentioned below as monitor 1).
I tried it with a TV (pi with openelec 4.2.1/5.0.0) and monitor (monitor 2), but without any config changes.
I just tried some configurations - not all possible - see first post (all params were changed together). I'm using Raspbian, not NOOBS.

Monitor 1 (LG Flatron E2411):

Code: Select all

# tvservice -m DMT
Group DMT has 11 modes:
           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 21: 1152x864 @ 75Hz 4:3, clock:108MHz progressive
           mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive
           mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive
  (prefer) mode 58: 1680x1050 @ 60Hz 16:10, clock:146MHz progressive
           mode 82: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
Monitor 2 (LG Flatron L1970HR):

Code: Select all

# tvservice -m DMT
Group DMT has 7 modes:
           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
  (prefer) mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive
Last edited by ioha on Fri Feb 27, 2015 10:36 am, edited 2 times in total.
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DougieLawson
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Re: HDMI does not seem to work

Wed Feb 25, 2015 11:47 am

Since you're getting some results from the tvservice command that means the monitor and the Pi are connected OK.

Try some of the other modes by adding a couple of lines to /boot/config.txt

hdmi_group=2
hdmi_mode=18 # 1024x768
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ioha
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Re: HDMI does not seem to work

Wed Feb 25, 2015 12:02 pm

DougieLawson wrote:Try some of the other modes by adding a couple of lines to /boot/config.txt

hdmi_group=2
hdmi_mode=18 # 1024x768
I've tried your suggested params incl. some other modes (4, 9, 16), but screens is only black (tested with monitor 2, LG Flatron L1970H).
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ioha
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Re: HDMI does not seem to work

Thu Feb 26, 2015 12:00 pm

Further ideas or suggestions?
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Re: HDMI does not seem to work

Thu Feb 26, 2015 12:03 pm

1) new sdcard
2) new download of raspbain
3) plug in HDMI to DVI adapter
4) power it up
what happens
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ioha
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Re: HDMI does not seem to work

Thu Feb 26, 2015 2:22 pm

RaTTuS wrote:1) new sdcard
2) new download of raspbain
3) plug in HDMI to DVI adapter
4) power it up
what happens
other sc card used (do not have a new one),
raspbian from 2015-02-16 written to card,
cable plugged,
powered up
=> no screen
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ioha
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Re: HDMI does not seem to work

Thu Feb 26, 2015 9:59 pm

Do you think it could be that the power pack is too bad?
Could you recommend power supply packs with 2 A?
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Re: HDMI does not seem to work

Thu Feb 26, 2015 11:52 pm

does it boot?

did you read the sticky? http://www.raspberrypi.org/forums/viewt ... 28&t=58151

You are simply trying to use a DVI-D monitor, with a somewhat overcomplicated cable.... Shouldn't be too hard to get working. ;)

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ioha
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Re: HDMI does not seem to work

Fri Feb 27, 2015 12:33 am

mahjongg wrote:does it boot?

did you read the sticky? http://www.raspberrypi.org/forums/viewt ... 28&t=58151

You are simply trying to use a DVI-D monitor, with a somewhat overcomplicated cable.... Shouldn't be too hard to get working. ;)
yes, it boots and everything is working fine (nginx, mariadb, owncloud, dns and time server), until i wanted to connect it to a monitor (first time).
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ioha
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Re: HDMI does not seem to work

Fri Feb 27, 2015 10:29 am

just before a few moments i tested it with NOOBS 1.4.0 following the guide:
http://www.raspberrypi.org/help/noobs-setup/

i did all steps and came until the 3rd step of first boot - no screen at all.
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ioha
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Re: HDMI does not seem to work

Fri Feb 27, 2015 10:39 am

output of edidparser (monitor 2, LG L1970HR):

Code: Select all

# edidparser test
Enabling fuzzy format match...
Parsing test...
HDMI:EDID version 1.3, 0 extensions, screen size 38x30 cm
HDMI:EDID features - videodef 0xee 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 56-75 Hz, horizontal is 30-71 kHz, max pixel clock is 110 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is L1970HR
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is
HDMI:EDID found preferred DMT detail timing format: 1280x1024p @ 60 Hz (35)
HDMI:EDID established timing I/II bytes are A5 6A 80
HDMI:EDID found DMT format: code 4, 640x480p @ 60 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 standard timings block x 8: 0x314F 454F 614F 8180 0101 0101 0101 0101
HDMI:EDID found DMT format: code 6, 640x480p @ 75 Hz (4:3) in standard timing 0
HDMI:EDID found DMT format: code 11, 800x600p @ 75 Hz (4:3) in standard timing 1
HDMI:EDID found DMT format: code 18, 1024x768p @ 75 Hz (4:3) in standard timing 2
HDMI:EDID found DMT format: code 35, 1280x1024p @ 60 Hz (5:4) in standard timing 3
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 (6) 640x480p @ 75 Hz with pixel clock 31 MHz (score 71080)
HDMI:EDID DMT mode (9) 800x600p @ 60 Hz with pixel clock 40 MHz has a score of 57600
HDMI:EDID best score mode is now DMT (11) 800x600p @ 75 Hz with pixel clock 49 MHz (score 97000)
HDMI:EDID DMT mode (16) 1024x768p @ 60 Hz with pixel clock 65 MHz has a score of 94370
HDMI:EDID best score mode is now DMT (18) 1024x768p @ 75 Hz with pixel clock 78 MHz (score 142964)
HDMI:EDID best score mode is now DMT (35) 1280x1024p @ 60 Hz with pixel clock 108 MHz (score 5260929)
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
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ioha
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Re: HDMI does not seem to work

Fri Feb 27, 2015 5:07 pm

so what do you recommend i should do? :?
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Re: HDMI does not seem to work

Fri Feb 27, 2015 11:04 pm

im not sure you cable "solution" is okay, normally when using a DVI-D monitor you simply use a HDMI to DVI-D cable, and the DVI-D simply acts like any HDMI monitor, except that DVI-D doesn't support sound. In fact DVI-D is simply a precursor of HDMI. nothing special is normally needed. Only that some DVI-D monitors do not have the built in I2C EEPROM with EDID data, and so you need to manually choose a configuration.

your monitor seems to indeed be a 1280x1024 (SXGA) DVI-D monitor, and EDID data seems valid, so that part of the cable is working.

I'm stumped too, but try reading this:
http://www.raspberrypi.org/forums/viewt ... =28&t=5851

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ioha
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Re: HDMI does not seem to work

Fri Feb 27, 2015 11:10 pm

mahjongg wrote:Is your monitor really a DVI-D, NOT a DVI-A?
Does your system boot?, does the ACT LED blink while booting, then only now or then.
Did you use NOOBS? if so did you try pressing 1 or 2 directly after booting to try another video mode (optimal or safe)
did you read my previous posts? my raspbian runs well since 2014, August (just no need for monitor). yes, it is dvi-d (see monitors in previous posts). the same issue is when i do a native hdmi connection with the tv (Sony KDL-46V3000) - but without any changes in /boot/config.txt.
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