Bug#685891: glXGetVideoSyncSGI fails to increment frame count when xrandr rotation is active

[Daniel Manjarres <danmanj@gmail.com>]

Package: libgl1-mesa-glx
Version: 8.0.4-2
Severity: important

Dear Maintainer,

With the intel portion of this driver:

I don't know why, but when Xrandr rotation is set to left, right, or inverted, 
the frame count returned by glXGetVideoSyncSGI is always zero, even though no 
error is reported via the return code. The frame count can be incrememnting as 
usual in normal mode, but when rotation is switched to any other mode it becomes 
zero. Switching back to normal rotation restores the expected incrementing behavior.