[Bug 74022] New: [pnv regression] Hang upon resume
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Fri Jan 24 08:22:07 PST 2014
https://bugs.freedesktop.org/show_bug.cgi?id=74022
Priority: medium
Bug ID: 74022
CC: intel-gfx-bugs at lists.freedesktop.org
Assignee: intel-gfx-bugs at lists.freedesktop.org
Summary: [pnv regression] Hang upon resume
QA Contact: intel-gfx-bugs at lists.freedesktop.org
Severity: normal
Classification: Unclassified
OS: All
Reporter: chris at chris-wilson.co.uk
Hardware: Other
Status: NEW
Version: XOrg CVS
Component: DRM/Intel
Product: DRI
Between 3.12 and drm-intel-nightly, we loose coherency after resume.
ring->get_seqno() = 0xffffeffe, but hws[0x20] = 0xfffff001
so the gpu is advancing and writing to the hws page, but the seqno is not
visible by the CPU - the cache snooping is bust. For SNB+, we had a similar
issue which required flushing the ring TLBs.
Bisect in progress.
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