[Bug 104343] ZaphodHeads + TearFree cause what looks like severe double buffering synchronization problems

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104343

--- Comment #7 from Werner Almesberger <werner at almesberger.net> ---
An update: attempts to set FORCE_FALLBACK or disable ACCEL_* in
src/sna/sna_accel.c only produced minor improvements without solving the
problem.

Increasing the damage region to cover the whole drawable in sna_mode_redisplay
seems to have no effect.

The best work-around so far is setting  Option "AccelMethod" "none"  in
xorg.conf. This restores correct operation, but - expectedly - at the price of
limited video rendering (e.g., mplayer can go full-screen with -vo gl but not
xv), slow 3D, and possibly more issue I haven't spotted yet.

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