[mythtv-users] Fedora 8, Intel G33 video, opengl vertical sync issues

Jason Surprise thesurprises1 at comcast.net
Sun Nov 11 03:30:00 UTC 2007

Hi I recently upgraded my fedora 7 system to 8, mainly to get at the 
latest intel 2.1.1 xorg driver which I couldn't figure out how to build 
on the f7 system.  The upgrade went smoothly.  All the video bits seem 
to be working properly.  DRI is enabled, glxinfo shows direct rendering 
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 19:25:17.051 Using realtime priority.
[mpeg2video @ 0x1060960]Warning MVs not available
2007-11-10 19:25:19.150 NVP: Timed out waiting for free video buffers.
2007-11-10 19:25:20.314 TV: Attempting to change from 
WatchingPreRecorded to None
2007-11-10 19:25:23.068 OpenGLVideoSync::Start(): A/V Sync reported 
error: Bad Context
2007-11-10 19:25:23.069 Video timing method: SGI OpenGL
2007-11-10 19:25:26.072 OpenGLVideoSync::Start(): A/V Sync reported 
error: Bad Context

If I disable this setting, video playback is normal.

BTW, the video tearing that plagues these graphics cards seems a bit 
worse with the latest driver.  Previously i would see tearing only on HD 
content, now I see it on SD playback as well.  I am hoping it is related 
to the issue above.  Still hoping that someone will be kind enough to 
add support for setting the XV port to use for playback, since the video 
overlay port on this card has no tearing issues.


More information about the mythtv-users mailing list