[Bug 75502] [SNB, IVB] Page flips hang indefinitely, apparently waiting for mmio writes that never happen
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Fri Mar 7 10:29:32 PST 2014
https://bugs.freedesktop.org/show_bug.cgi?id=75502
--- Comment #20 from Simon Farnsworth <simon at farnz.org.uk> ---
It doesn't print after the freeze.
I can see that dmesg covers me back to boot time on the system, but "dmesg |
grep -i busy" shows nothing, even with your patch in place.
Xorg is logging lots of pairs of
[ 6527.065] (WW) intel(0): Page flip failed: Device or resource busy
[ 6527.068] (WW) intel(0): flip queue failed: Device or resource busy
# cat /sys/kernel/debug/dri/0/i915_gem_pageflip
Flip queued on pipe A (plane A)
Flip queued on frame 364351, now 541203
Stall check enabled, 1 prepares
Old framebuffer gtt_offset 0x02f44000
New framebuffer gtt_offset 0x0093c000
MMIO update completed? 0
No flip due on pipe B (plane B)
is obviously stuck.
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