[Bug 75502] New: [SNB] Page flips hang indefinitely, apparently waiting for interrupts that never happen
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Feb 25 09:00:09 PST 2014
https://bugs.freedesktop.org/show_bug.cgi?id=75502
Priority: medium
Bug ID: 75502
Assignee: chris at chris-wilson.co.uk
Summary: [SNB] Page flips hang indefinitely, apparently waiting
for interrupts that never happen
QA Contact: intel-gfx-bugs at lists.freedesktop.org
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: simon at farnz.org.uk
Hardware: x86-64 (AMD64)
Status: NEW
Version: unspecified
Component: Driver/intel
Product: xorg
I'm seeing pageflips give up on me on SNB hardware - Celeron 847, i5-2400S -
where the CRTC becomes unexpectedly busy and never recovers.
When I'm failed, I can see interrupts coming in (Interrupts received in
/sys/kernel/debug/dri/0/i915_gem_interrupt increments), but the queued flip
never happens:
# cat /sys/kernel/debug/dri/0/i915_gem_pageflip
Flip queued on pipe A (plane A)
Stall check enabled, 1 prepares
Old framebuffer gtt_offset 0x01354000
New framebuffer gtt_offset 0x0093c000
No flip due on pipe B (plane B)
# cat /sys/kernel/debug/dri/0/i915_gem_interrupt
North Display Interrupt enable: 8eb48585
North Display Interrupt identity: 00000000
North Display Interrupt mask: 734bfa7a
South Display Interrupt enable: ffffffff
South Display Interrupt identity: 00000000
South Display Interrupt mask: f114ffff
Graphics Interrupt enable: 00401001
Graphics Interrupt identity: 00000000
Graphics Interrupt mask: ffffffff
Interrupts received: 1006958
Graphics Interrupt mask (render ring): ffffffff
Current sequence (render ring): 1472838
Graphics Interrupt mask (bsd ring): ffffffff
Current sequence (bsd ring): 1271460
Graphics Interrupt mask (blitter ring): ffffffff
Current sequence (blitter ring): 1472839
I'm running packages from Fedora 20:
# rpm -q mesa-libGL kernel xorg-x11-server-Xorg xorg-x11-drv-intel libva-
intel-driver libdrm
mesa-libGL-9.2.5-1.20131220.fc20.x86_64
kernel-3.13.3-201.fc20.x86_64
xorg-x11-server-Xorg-1.14.4-90.fc20.x86_64
xorg-x11-drv-intel-2.21.15-5.fc20.x86_64
libva-intel-driver-1.2.1-1.fc20.x86_64
libdrm-2.4.50-1.fc20.x86_64
I will attach dmesg from a failed system - note that no error state has been
collected.
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