[Intel-gfx] Tearing video on Sandy Bridge

[tino.keitel+xorg at tikei.de]

On Thu, May 03, 2012 at 16:32:47 -0400, Chun-Yu Shei wrote:
> On 05/03/2012 03:51 PM, tino.keitel+xorg at tikei.de wrote:
> >On Thu, May 03, 2012 at 21:46:37 +0200, Daniel Vetter wrote:
> >>On Thu, May 03, 2012 at 09:34:28PM +0200, Tino Keitel wrote:
> >>>On Thu, May 03, 2012 at 20:43:01 +0200, Daniel Vetter wrote:
> >>>
> >>>[...]
> >>>
> >>>>The only way to get tear-free screen updates on snb is with pageflips,
> >>>>which requires a opengl compositor
> >>>
> >>>Thanks. What do you mean with "opengl compositor"? Isn't the Gnome3
> >>>desktop providing this?
> >>
> >>Well, it needs to do vsync'ed updates, and to work correctly, the client
> >
> >Is this in the dri config file?
> 
> I've had tear-free video (finally!) in GNOME 3 for a while now,
> using the following in my ~/.xsession (and launching that from GDM
> instead of GNOME directly):
> 
> CLUTTER_PAINT=disable-clipped-redraws:disable-culling
> /etc/X11/Sessions/Gnome

Thanks, I'll try that. When I goggled for that, I also found people
using CLUTTER_VBLANK=True.

Regards,
Tino