[mythtv] Mythfrontend - freeze on FF/REW "prebuffering" libmpeg2 [backtrace / strace included]

[Andy Poling]

On Wed, 16 Feb 2005, Blammo wrote:
> What else can I provide to help with this issue?

Try building w/o GL sync (comment it out in settings.pro).  For me, that
eliminated 99% of the "lockups" related to OSD activity.  Running with RTC
sync (which you'll probably fall back to if you don't have GL) seems to
prevents what I can only guess is a deadlock between the GL refresh wait and
something else.

I know it's not as optimal as GL sync in terms of accuracy, but it might:

a) let you use the system until the bug is found and squashed

b) confirm that there is a problem with GL sync and XvMC, and it's not just
   me.  ;-)

Somebody recently did some re-organizing of VideoOutputXvMC::Show() in cvs,
and it seems to have changed the flavor of the problems I'm seeing.  I now
have less severe stuttering, and less corruption of the rest of the frame by
the OSD.  The OSD has sync issues now, but at least it doesn't crash and burn.

I have some crazy ideas about what the problem is, but they're not well formed
enough to share yet.  I try to spend a little time each day learning the code
paths involved.

-Andy