[mythtv-users] New LCD TV - complains about 'mode not supported'

[David Whyte]

On Tue, Aug 5, 2008 at 11:04 PM, David Whyte <david.whyte at gmail.com> wrote:
>>
>
> Tried that just now but no luck.
>
> I can easily get 1360x768 using xrandr, but that suck not being done
> for you at boot-up.
>
> mythtv-user at mythFE-David:~$ xrandr -d :0 -q
> Screen 0: minimum 320 x 200, current 1360 x 768, maximum 1360 x 1360
> VGA disconnected (normal left inverted right)
> LVDS connected 1024x768+0+0 (normal left inverted right) 0mm x 0mm
>   1024x768       60.0*+   85.0     75.0     70.1     60.0
>   832x624        74.6
>   800x600        85.1     72.2     75.0     60.3     56.2
>   640x480        85.0     72.8     75.0     59.9
>   720x400        85.0
>   640x400        85.1
>   640x350        85.1
> TMDS-1 connected 1360x768+0+0 (normal left inverted right) 160mm x 90mm
>   1360x768       60.0*+
>   1280x720       60.0
>   1024x768       60.0
>   800x600        60.3
>   640x480        60.0
> TV disconnected (normal left inverted right)
> mythtv-user at mythFE-David:~$
>
> I guess I just need to find that sweet spot to massage in my
> xorg.conf.  Thanks for your response though.
>

Found the sweet spot.

It seems that the intel driver always assumes that the 915GM mobile
chip *always* has a laptop monitor connected, even when my miniPC does
not, hence the LVDS output above.  That was forcing the TMDS-1 output
to be 1024x768 since the ghost LVDS couldn't support the higher
resolution I was specifying.

A bug report for Ubuntu showed my the fix
(https://bugs.launchpad.net/ubuntu/hardy/+source/xserver-xorg-video-intel/+bug/233787)
and the relevant config in my xorg.conf is now

Section "Device"
        Identifier      "Intel Corporation Mobile 915GM/GMS/910GML Express Grap$
        Driver          "intel"
        BusID           "PCI:0:2:0"
        Option          "UseFBDev"              "true"
        # This is one of the important lines.
        Option          "monitor-LVDS"          "LVDS"
EndSection

Section "Monitor"
        Identifier      "Generic Monitor"
        Option          "DPMS"
        HorizSync       28-64
        VertRefresh     43-60
        Modeline        "640x480_60.00"  23.86  640 656 720 800  480 481 484 49$
        ModeLine        "1360x768_60.00"  84.72  1360 1424 1568 1776 768 769 77$
EndSection

# Specify here that we want the LVDS monitor to be ignored.
Section "Monitor"
        Identifier      "LVDS"
        Option          "Ignore"        "True"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "Intel Corporation Mobile 915GM/GMS/910GML Express Grap$
        Monitor         "Generic Monitor"
        DefaultDepth    24
        SubSection "Display"
                Modes           "1360x768_60.00" "640x480_60.00"
        EndSubSection
EndSection


Thanks for everyones help,
Whytey