[mythtvnz] Fullscreen display on CRT under Ubuntu

[Steven Ellis]

On 18/09/2009, at 6:40 PM, Stephen Worthington wrote:

> On Fri, 18 Sep 2009 16:25:37 +1200, you wrote:
>
>> I am hoping someone can help me through this...
>>
>> I am running Ubntu jaunty with a nvidia 9500 GT connecting to a CRT  
>> TV
>> using S-Video.
>>
>> When I boot ubuntu I only get part of my desktop on the TV. The
>> centre, and I am missing the top and left of the desktop.
>>
>> How can I change me xorg.conf to tell X to use a custom resolution  
>> (if
>> that is what I need to to) and to offset my output to the left and  
>> up?
>>
>> If I boot windows XP I get a full 1024x768 desktop on the CRT.
>>
>> Cheers,
>> Stuart.
>
> X configs are a bit complicated if you need to customise them.  We
> need a bit more information.  First, are you using the accelerated
> Nvidia drivers for your card (and if so what version), or the open
> source nv drivers, or even the Vesa drivers?  Second, what is your
> current /etc/X11/xorg.conf file?  Have you modified it at all?
>
> Below is the XF86Config-4 file I used to use with my old CRT TV and
> S-Video under KnoppMyth.  It should be similar to what you want for
> your xorg.conf file for TV output, but TV output is 720x576 - it would
> need to be adjusted to do 1024x768.  I am not sure if an old CRT will
> do 1024x768 anyway - I would have thought that resolution was a bit
> more than it could cope with and even if it worked, everything would
> be too small and fuzzy.
>
> Also, an 9500 GT card will do VDPAU acceleration and for that you need
> to be using Nvidia driver version 180 (reasonably stable) or above
> (reportedly less stable, but I have not tried 185 or 190).
>
>

Excuse the edit ;)

Yeah the usual culprit is overscan or not setting the best resolution  
for analogue.

So for anyone still using Composite or SVIdeo are you using a native  
PAL resolution or using 800x600 or 1024x768

For myPVR we went with 720x576 flagged as 4:3 which generally provided  
the best picture quality for naive pal broadcasts.

Steve


Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

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