[MPlayer-users] Tearing and VSync [WAS: Re: Mplayer picture question]

Ilkka Karvinen kartsan at gmail.com
Mon Apr 28 23:40:50 CEST 2008

On Tuesday 22 April 2008 01:06, Martin Emrich wrote:
> Hi!
> Martin Emrich schrieb:
> > I'll take a look at what nvidia-settings has to offer...
> nvidia-settings is linked against GTK+, which i don't have on my media
> player box. But the solution was sooo simple:
> xvattr -a XV_SYNC_TO_VBLANK -v 1
> and all is well.

Just an update to this. Previously I was happily reporting that all my
tearing/vsync problems were over. Unfortunately that was based on
only a few films which seemed ok. Afterwards I realised that other
films still caused tearing. I don't know why..

Anyways, I started to use mythtv with DVB card which showed tearing all the
time. I used opengl, and vsync was enabled everywhere, still tearing. 
I tried all kinds of setting combinations. Then I found one interesting
xorg.conf in nvidia forum and this guy with the same video card (8500gt)
was reported in that forum that setting a certain value like this:

nvidia-settings -a XVideoSyncToDisplay=DFP-0 (or 0x10000)

Which means "synchronise to display DFP-0" helped him. He used (like me)
DFP-0 screen to show videos. I tried that also but I found out that disabling 

    Option         "Composite" "Disable"

removed all the tearing in my system despite of the other setting. Why is
that? Composite extension slows the system so much?


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