[Bug 75207] New: render ring hung

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75207

          Priority: medium
            Bug ID: 75207
          Assignee: idr at freedesktop.org
           Summary: render ring hung
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: All
          Reporter: lemody at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/DRI/i965
           Product: Mesa

Rendering *very slow* with Metro game (or likely also other GL app) with Mesa
master, following message seen on console:

[drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x20d86000 ctx
2) at 0x20d87398

bisected to
--- 8< ---
commit d92f593d8776ec157ad0e7fa2ee8c9a17fd744ce
Author: Eric Anholt <eric at anholt.net>
Date:   Thu Feb 13 21:37:50 2014 -0800

    i965/fs: Use conditional sends to do FB writes on HSW+.

    This drops the MOVs for header setup, which are totally mis-scheduled.
--- 8< ---

commits before this change work fine.

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