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HDMI:EDID version 1.0, 0 extensions, screen size 16x12 cm
HDMI:EDID features - videodef 0xa2 standby suspend active off; colour encoding:RGB444|YCbCr444; sRGB is default colourspace; preferred format is native; does not support GTF
HDMI:EDID ignored unknown descriptor tag 0x10
HDMI:EDID found monitor ascii descriptor tag 0xfe
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is Color_LCD
HDMI:EDID does not yet know monitor vertical range, setting to default 24 to 120Hz
HDMI:EDID failed to find a matching detail format for 1536x2048p hfp:12 hs:16 hbp:48 vfp:8 vs:4 vbp:8 pixel clock:202 MHz
HDMI:EDID calculated refresh rate is 61 Hz
HDMI:EDID guessing the format to be 1536x2048p @60 Hz
HDMI:EDID found unknown detail timing format: 1536x2048p hfp:12 hs:16 hbp:48 vfp:8 vs:4 vbp:8 pixel clock:202 MHz
HDMI:EDID established timing I/II bytes are 00 00 00
HDMI:EDID standard timings block x 8: 0x0101 0101 0101 0101 0101 0101 0101 0101
HDMI:EDID adding mandatory support for DMT (4) 640x480p @ 60Hz
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID no known preferred format has been set
HDMI:EDID filtering preferred group has been changed from Invalid to DMT
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 preferred mode is updated to DMT (4) 640x480p @ 60 Hz with pixel clock 25200000 Hz
HDMI:EDID has only DVI support and no audio support
edid_parser exited with code 0
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# For more options and information see
# http://rpf.io/configtxtreadme
# 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=1536
framebuffer_height=2048
max_framebuffer_width=1536
max_framebuffer_height=2048
# 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=87
# 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=800
# 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
hdmi_ignore_edid=0xa5000080
hdmi_timings=1536 0 150 5 5 2048 0 8 1 8 0 0 0 60 0 210337920 1
hdmi_pixel_freq_limit=400000000
#display_rotate=1
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
gpu_mem=128
start_x=1
Hey @aBUGSworstnightmare, Thanks for the insights. After doing research and learning about the timings etc, i built out a hdmi_timings identical to what you posted. It works well enough for portrait mode, however when i display_rotate=1 it clips the sides. a fbset -v shows it at 1536x1536 which is weird. I have tried ever combination of max_framebuffer and frramebuffer to try and get it to fill the screen. Any thoughts?aBUGSworstnightmare wrote:1.) How do you drive the Display (A/D-board connected via HDMI i.e)?
2.) Timing data taken from page 9 in the data sheet --> why can't you use this Timing?
<h_active_pixels> = 1536
<h_sync_polarity> = 0
<h_front_porch> = 12
<h_sync_pulse> = 16
<h_back_porch> = 48
<v_active_lines> = 2048
<v_sync_polarity> = 0
<v_front_porch> = 8
<v_sync_pulse> = 4
<v_back_porch> = 8
<v_sync_offset_a> = 0
<v_sync_offset_b> = 0
<pixel_rep> = 0
<frame_rate> = 60
<interlaced> = 0
<pixel_freq> = 200020000
<aspect_ratio> = 1
Thanks again for following up @aBUGSworstnightmare. Appreciate it. I have tried changing the framebuffer while leaving the timings per the spec, but unfortunately it clips to 1536x1536. if i also change the max_framebuffer to inverted (which to me would make sense to why it was clipping to 1536x1536) then it won't boot up at all (stuck on the rainbow preboot splash page).aBUGSworstnightmare wrote:You need to change your framebuffer from 1536x2048 to 2048x1536 when you want to use it landscape. The timing needs to stay portrait (as per spec).
Btw: display_rotate=3
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overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
#disable_overscan=1
hdmi_drive=1
hdmi_ignore_edid=0xa5000080
hdmi_group=2
hdmi_mode=87
#60Hz
hdmi_pixel_freq_limit=206000000
hdmi_timings=2048 0 150 5 5 1536 0 3 1 9 0 0 0 60 0 205210000 1
max_framebuffer_width=2048
max_framebuffer_height=1536
display_rotate=0
framebuffer_width=2048
framebuffer_height=1536
This is years after the quoted post, but does this hdmi_cvt featuredom wrote: ↑Tue Dec 04, 2012 11:03 pmWe've had a steady stream of requests for supporting HDMI modes that aren't from the official CEA/DMT list of modes.
I've implemented CVT:
http://en.wikipedia.org/wiki/Coordinated_Video_Timings
You specify the new mode in config.txt with the following config string:The first three arguments are required. The remaining ones are optional. aspect defaults to 16:9 if not specified.Code: Select all
hdmi_cvt=<width> <height> <framerate> <aspect> <margins> <interlace> <rb> width width in pixels height height in pixels framerate framerate in Hz aspect aspect ratio 1=4:3, 2=14:9, 3=16:9, 4=5:4, 5=16:10, 6=15:9 margins 0=margins disabled, 1=margins enabled interlace 0=progressive, 1=interlaced rb 0=normal, 1=reduced blanking
It should appear if you doAn example:Code: Select all
tvservice -m DMT
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hdmi_cvt=1680 1050 60 5 0 0 1
(The custom mode will be 87). You might want to test it:Code: Select all
tvservice -m DMT ... mode 87: 1680x1050 @ 60Hz 16:10, clock:119MHz progressive
(The fbset gets the console back after closing the display).Code: Select all
tvservice -e "DMT 87" fbset -depth 8 && fbset -depth 16
You can also do the usual:to make the custom mode the default.Code: Select all
hdmi_group=2 hdmi_mode=87
Please note. There is no guarantee your display will support the resolution/framerate produced by this.
But if you are currently running a monitor at a non native resolution, then this may be worth a try.
Are you using hdmi_cvt or hdmi_timings as per my post ? I can confirm that what I did works with my unusual resolution panel.
You are saying that during Boot, a panel appears on the desktop
No - my mention of panel was the LCD screen panel. If you look at my posted timings you will see I use hdmi_timings not hdmi_cvt in my config.txt file.aeneas wrote: ↑Fri Sep 22, 2017 1:15 pmYou are saying that during Boot, a panel appears on the desktop
and allows user to confirm the resolution selected in the hdmi_cvt
command ?
Isn't the PVM-14M4U an SD CRT broadcast monitor?Alec006 wrote: ↑Sun Sep 24, 2017 6:52 amHi I'm a noob sorry if I make an stupid question! I have a pvm-14m4u connected with a pi2scart and I'm looking tu run a resolution of 400x254 at 52hz or something near to get native resolution.
now i'm using this
hdmi_timings=506 1 8 44 52 240 1 6 10 6 0 0 0 60 0 9600000 1
is it possible to get something near that wierd one?
thanks in advance
this is all the info I have
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hdmi_cvt 480 800 60
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pi@raspberrypi:~ $ tvservice -s
state 0x120006 [DVI DMT (87) RGB full 16:9], 480x800 @ 60.00Hz, progressive
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pi@raspberrypi:~ $ tvservice -d edid.dat
Written 128 bytes to edid.dat
pi@raspberrypi:~ $ [color=#000000][color=#0000FF]edidparser edid.dat[/color][/color]
Enabling fuzzy format match...
Parsing edid.dat...
HDMI:EDID version 1.3, 0 extensions, screen size 15x10 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 ignored unknown descriptor tag 0x10
HDMI:EDID ignored unknown descriptor tag 0x10
HDMI:EDID ignored unknown descriptor tag 0x10
HDMI:EDID does not yet know monitor vertical range, setting to default 24 to 120Hz
HDMI:EDID failed to find a matching detail format for 480x800p hfp:40 hs:48 hbp:40 vfp:13 vs:3 vbp:29 pixel clock:32 MHz
HDMI:EDID calculated refresh rate is 62 Hz
HDMI:EDID guessing the format to be 480x800p @60 Hz
HDMI:EDID found unknown detail timing format: 480x800p hfp:40 hs:48 hbp:40 vfp:13 vs:3 vbp:29 pixel clock:32 MHz
HDMI:EDID established timing I/II bytes are 00 00 00
HDMI:EDID standard timings block x 8: 0x0101 0101 0101 0101 0101 0101 0101 0101
HDMI:EDID adding mandatory support for DMT (4) 640x480p @ 60Hz
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID no known preferred format has been set
HDMI:EDID filtering preferred group has been changed from Invalid to DMT
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 preferred mode is updated to DMT (4) 640x480p @ 60 Hz with pixel clock 25200000 Hz
HDMI:EDID has only DVI support and no audio support
edid_parser exited with code 0
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HDMI:EDID guessing the format to be 480x800p @60 Hz
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hdmi_timings
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hdmi_ignore_edid = 0xa5000080
hdmi_timings=480 0 2 41 2 272 0 2 10 2 0 0 0 60 0 9600000 3
hdmi_group=2
hdmi_mode=87
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tvservice -s
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state 0x120009 [HDMI DMT (87) RGB full 16:9], 480x272 @ 60.00Hz, progressive
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