[mythtv-users] Fedora 8, Intel G33 video, opengl vertical sync issues
gnassas at mac.com
Mon Nov 19 01:05:15 UTC 2007
On 10-Nov-07, at 10:30 PM, Jason Surprise wrote:
> latest intel 2.1.1 xorg driver which I couldn't figure out how to
> is enabled. glxgears is working. However, I am now unable to set 'Use
> OpenGL for vertical sync for timing' in mythtv. I get video that is
> unwatchable and the following error message from myth:
> 2007-11-10 19:25:23.068 OpenGLVideoSync::Start(): A/V Sync reported
> error: Bad Context
Sorry, I didn't see your post until just now.
The problem is the 2.1.1 driver only supports GL sync for 3D
operations. Luckily it's easy to restore support for 2D sync as well.
Details are here:
Basically go to src/i830_dri.c and make I830DRITransitionTo2d look a
lot like I830DRITransitionTo3d. Myth now reports it's using DRI sync
instead of OpenGL but whatever, the tearing is gone, the picture is
awesome and life is good.
Later in the thread the developers signal they're going to straighten
this out at some point so you won't have to patch the driver forever.
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