[Bug 103025] [GM45] loss of driver acceleration after some time

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103025

--- Comment #16 from Adric Blake <promarbler14 at gmail.com> ---
Created attachment 134732
  --> https://bugs.freedesktop.org/attachment.cgi?id=134732&action=edit
Xorg log tail with capture of the latest vblank error

The most recent assertion failure recurred, much faster (and it seems more
frequent) than before:
[   790.049] (EE) sna_crtc_set_vblank:660 assertion '(*sna_crtc_flags(crtc) &
CRTC_VBLANK) < 3' failed
This comes several lines after a rather disconcerting message:
[   789.326] sna_present_vblank_handler: arrived unexpectedly early (not
queued)

The glxgears program I had running also shows yet another bug. Shortly before
the bug occured, the window suddenly stops rendering (it logs no FPS). After
restarting glxgears the window is still black and the FPS runs as if it were
not synced (several hundred FPS). This bug also has just happened again shortly
after Xorg is restarted; by chance I caught it stop, and it only goes black
once the window becomes obscured.

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