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

[Alessandro]

> if you log to your machine using ssh or other, can you run xrandr to
> switch to that resolution ?
> when you do:
> DISPLAY=:0.0 xrandr
> what do you get?

Screen 0: minimum 320 x 175, current 1440 x 900, maximum 1440 x 900
default connected 1440x900+0+0 0mm x 0mm
   1440x900       50.0*    51.0     52.0
   1360x768       53.0     54.0
   1280x720       55.0     56.0
   1152x864       57.0     58.0     59.0     60.0
   1024x768       61.0     62.0     63.0     64.0     65.0     66.0
 67.0     68.0
   960x600        69.0
   960x540        70.0
   840x525        71.0     72.0     73.0     74.0     75.0
   832x624        76.0
   800x600        77.0     78.0     79.0     80.0     81.0     82.0
 83.0     84.0
   720x576        85.0
   720x480        86.0
   720x450        87.0
   720x400        88.0
   700x525        89.0     90.0
   680x384        91.0     92.0
   640x480        93.0     94.0     95.0     96.0     97.0     98.0     99.0
   640x400       100.0
   640x350       101.0
   512x384       102.0    103.0    104.0
   400x300       105.0
   320x240       106.0    107.0
   320x175       108.0

So I tried to set it manually using:
DISPLAY=:0.0 xrandr --output default --mode "1440x900" -r 50
(didn't work - no signal)
and also via
DISPLAY=:0.0 xrandr --output default --mode "1440x900" -r 51
no signal either.

The strange thing is - I *KNOW* the TV supports 1440x900 - as when the
PC is booting up - and using the default ubuntu driver for the display
- the TV is showing on the OSD -  HDMI 1440x900 60hz ! it does fine
until just after showing the Mythbuntu splash screen - (with the red
dots under the text) - then it loses the picture!
I just can't find a way to work out what modeline is working for this thing!

Is it a good idea - to disable the NVIDIA driver - boot into Mythbuntu
and see why/how it is supporting/displaying the 1440x900 ??
I'm running out of ideas now :(

thanks again to all of you for your help!
Alesssndro