[mythtv-users] Lots of "tearing" with vdpau in trunk

[Kevin Ross]

On 10/26/2010 10:21 AM, Emmanuel wrote:
> Ryan Patterson a écrit :
>> On Tue, Oct 26, 2010 at 9:53 AM, Emmanuel <eallaud at gmail.com> wrote:
>>> Hi all,
>>> i am using trunk withh vdpau (standard) with progressive content 
>>> mostly. I
>>> have an isuue with fast movements which appear cut (is that tearing)
>>> probably because there is a mismatch between film rate and display 
>>> rate.
>>> And moreove I thought that we could match these two rates before, 
>>> but the
>>> option is no more, is that done automatically now? If so it looks 
>>> like there
>>> is a bug.
>>
>> Are you using a compositing window manager on your desktop?  (i.e.
>> beryl, compiz, ubuntu desktop effects, etc.)  If so there should be a
>> setting on your window manager to adjust the refresh frame rate.  Once
>> you set that equal to your display refresh rate, the tearing should be
>> gone.
> Hmm I am using XFCE so no compositing manager here. Other thouhgts?
> Thanks
> Bye
> Manu

You probably need to disable compositing in your xorg.conf file.  I use 
Gnome, no compiz or other fancy special effects window manager, and I 
still need to disable it in xorg.conf to get tear-free playback.  Run:

$ sudo nvidia-xconfig --no-composite

Then restart X (or reboot).