[mythtv-users] Help getting HDMI to work for mythfrontend

Jean-Yves Avenard jyavenard at gmail.com
Wed Dec 1 09:49:08 UTC 2010


On 1 December 2010 20:21, Alessandro <alessandro.campobassi at gmail.com> wrote:

> I've tried to trim and paste the relevant parts of the Xorg.0.log file
> here. It looks to be like its validating the 1440x900 resolution, but
> it falls back to 1025x768 which gives me 'blue screen' :( My Xorg.conf
> file is pasted below too.
> Any ideas?I don't understand why mythbuntu driver can display 1440x900
> but NVIDIA can't ?

> (II) Dec 01 09:14:14 NVIDIA(0): Setting mode "1440x900_60"
> <snip>
> (II) Dec 01 09:14:17 NVIDIA(0): Setting mode "1024x768"
> Looks like it sets 1440x900 - but a few lines later it sets 1024x768?

Yeah, something is changing the resolution back to 1024x768

I would add the following to your system:

In the "Monitor" section add:
    Option         "ExactModeTimingsDVI" "True"
    Option         "UseEDIDFreqs" "False"

In the "Screen" section add:
Option         "FlatPanelProperties" "Scaling = Native"

In the "Device" section add if using VDPAU:
Option         "HWCursor" "false"

So your xorg.org becomes:

Section "ServerLayout"
   Identifier     "Layout0"
   Screen      0  "Screen0" 0 0
   InputDevice    "Keyboard0" "CoreKeyboard"
   InputDevice    "Mouse0" "CorePointer"
   Option         "Xinerama" "0"

Section "Files"

Section "InputDevice"

   # generated from default
   Identifier     "Mouse0"
   Driver         "mouse"
   Option         "Protocol" "auto"
   Option         "Device" "/dev/psaux"
   Option         "Emulate3Buttons" "no"
   Option         "ZAxisMapping" "4 5"

Section "InputDevice"

   # generated from default
   Identifier     "Keyboard0"
   Driver         "kbd"

Section "Monitor"
   Modeline "1440x900_60"  106.50  1440 1528 1672 1904  900 903 909
934 -hsync +vsync
   Identifier     "Monitor0"
   VendorName     "Polaroid"
   ModelName      "Proview TLU-01911CU"
   HorizSync       31.0 - 60.0
   VertRefresh     60.0 - 75.0
   Option         "DPMS"
   Option         "DPI" "96 x 96"
    Option         "ExactModeTimingsDVI" "True"
    Option         "UseEDIDFreqs" "False"
    Option         "ExactModeTimingsDVI" "True"
    Option         "UseEDIDFreqs" "False"

Section "Device"
   Identifier     "Device0"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "ION"
   Option         "CustomEDID" "DFP-0:/etc/X11/tv-edid.bin"   #Force a
custom EDID.
   Option         "UseDisplayDevice" "DFP-0"
   Option         "ConnectedMonitor" "DFP-0"
   Option         "ModeDebug" "True"  #This will turn up logging in
the /var/log/Xorg.0.log file.
   Option         "HWCursor" "false"

Section "Screen"
   Identifier     "Screen0"
   Device         "Device0"
   Monitor        "Monitor0"
   DefaultDepth    24
   Option         "FlatPanelProperties" "Scaling = Native"
   Option         "TwinView" "0"
   SubSection     "Display"
       Depth       24
       Modes      "1440x900_60"

If your custom modeline is good, you should get a picture now.

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