Nvidia-cards and no picture when box is on before the TV

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Revision as of 12:47, 21 May 2009 by Tafkaz (talk | contribs)

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I had following Problem: My new tv which i attached to my mythtv-box using hdmi showed a perfect picture, only if the screen was turned on BEFORE i switched on the mythtv-computer. This was particularly annoying because i was using ACPI-Wakeup to wake up the machine automatically whenever a recording was to be done. So whenever i came home, and the machine had woken up, i had no picture on my telly... This seems to be a quite common problem with some nvidia-cards and some tv-sets not talking to each other in exactly the same language. At least this is what i understood...:-)

Here's a short description of how i managed to fix the problem (with great help from #mythtv-de):


while seeing the desktop on your mythtv-box, start 'nvidia-settings'

Go to the entry on the left representing your TV under 'GPU 0'. In my case this was 'DFP-0'.

Here now you click on 'Acquire EDID', and save the edid.bin file to some safe place. I just copied it to /etc/X11/.

After closing 'nvidia-settings' again you open your /etc/X11/xorg.conf with your favourite editor and add this line to the 'device'-section:

   Option         "CustomEDID" "DFP-0:/etc/X11/edid.bin"

(Please edit this line to your needs!)

After a reboot things should again work as expected!

If not, here's some other things you could try and put into your device section:

   Option         "ModeValidation" "NoDFPNativeResolutionCheck"
   Option         "ExactModeTimingsDVI" "True"
   Option         "UseDisplayDevice" "DFP-0"
   Option         "ConnectedMonitor" "DFP-0"''