[mythtv-users] Moved to DVI and now blank play back

[Michael T. Dean]

On 05/19/2008 11:14 AM, Jason Portwood wrote:
> I recently made some changes to my setup and decided to use my backend as 
> a front end.  I have a MythBuntu system running with a NVIDIA Geforce 7200 
> (a pretty cheap card) and using the NVIDIA drivers.  I moved it from using 
> VGA to DVI (using a DVI to HDMI cable).
>
> The system recongizes the display just fine (boot sequence / desktop). 
> MythTV does too for the menus.  However when I play any video the screen 
> just goes blank.
>
> The TV (Samsung HL61750) supports 1920 x 1080 which the video card is set 
> to that resolution.
>
> Anyone have any ideas?

TwinView enabled (perhaps without your knowledge)?  Xv is only supported
on the "primary" display, so it sounds like you have TwinView or some
other Xinerama(-variant) and would get video on a monitor connected to
VGA while getting a blank screen on the TV.  (Of course, if the
VGA-connected monitor were to change the autodetection sufficiently to
change the Xinerama configuration, the process of testing may prevent
you from seeing the expected results...)

Mike