[mythtv-users] OT - aspect ratio and non-square pixel display

[Michael T. Dean]

On 05/19/2013 10:45 PM, Jeremy Jones wrote:
>
> Hi,
>
> I have an older wide screen (16:9) plasma with a native resolution of 
> 1024x768.  It will accept a resolution of 1280x720, but it overscans.  
> In the past I just used a setting in the nvidia driver to compensate 
> for the overscan. At some point that feature of the driver went away. 
> My system defaulted to the native resolution of 1024x768 and myth has 
> been treating the display as a 4x3 screen.  I set out to fix this this 
> weekend and found a page on the MythTV wiki that explained how to set 
> the aspect ratio using displaysize in the coefficient.conf file.  
> Trouble is adding that line has no effect.  It seem that the setting 
> is controlled somewhere else.  I'm running mythbuntu 12.04.
>
> Anyone know what could be overriding that setting?
>

coefficient.conf?

You need to either set the DisplaySize in X or set the resolution and 
DPI and let X calculate the display size, so it can calculate the 
physical aspect ratio.

http://www.mythtv.org/wiki/Display_Size
http://www.mythtv.org/wiki/Specifying_DPI_for_NVIDIA_Cards

Mike