Bug#256052: more info
So I spoke with Marc Aurele La France about this, and he pointed me to
the fix made in XFree86 xc/programs/Xserver/hw/xfree86/common/xf86xv.c
between version 1.37 and 1.38. It's a small fix. The current version of
this file in the DSFG X is 1.35, but this file is specifically licensed
under the XFree86 1.0 license, and is included in the Xorg X server. So
it should be able to be backported here.
Here's the URL to see the diff:
http://cvsweb.xfree86.org/cvsweb/xc/programs/Xserver/hw/xfree86/common/xf86xv.c.diff?r1=1.37&r2=1.38
I think that the "Backport s3 driver from sanitized XFree86" item in
the TODO list would fix this bug as well, because the problem is in
xf86XVCopyYUV12ToPacked(). I was told that this bug would affect any
driver that used these generic xv routines on a big-endian system.
Also, the reason a second video app looks OK is that only one app can
have use XV at a time. The second app fails to open XV, and falls back
to XSHM.
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