[Bug 83826] New: [HSW regression] GPU HANG: ecode -1:0x00000000, reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83826

          Priority: medium
            Bug ID: 83826
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW regression] GPU HANG: ecode -1:0x00000000,
                    reason: Ring hung, action: reset
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: thilo at ginkel.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

System environment:
-- chipset: QM87
-- system architecture: x86_64
-- xf86-video-intel/xserver/mesa/libdrm version:
   - xf86-video-intel: 2.99.914 (git commit
f36b7a4aac86f5874c32d8f516ac1f00a6c8d8b3)
   - xserver: 1.15.1
   - mesa: 10.1.3
   - libdrm: 2.4.52
-- kernel version: 3.17.0-rc4 (built from -nightly @ 99f444f [same happens with
current nightly])
-- Linux distribution: Kubuntu 14.04
-- Machine or mobo model: Lenovo ThinkPad T440p 20AN
-- Display connector: DVI, DisplayPort
3) Reproduce steps:

When logging into KDE the login progress comes to a halt for ~ 15-30s and the
following is logged to dmesg:

[   69.722297] [drm] no progress on render ring
[   69.723011] [drm] GPU HANG: ecode -1:0x00000000, reason: Ring hung, action:
reset
[   69.723014] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[   69.723015] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[   69.723016] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[   69.723017] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[   69.723018] [drm] GPU crash dump saved to /sys/class/drm/card0/error

I tried bisecting the problem, but due to bug #83166 this does not work too
well...

Earlier nightly builds did not suffer from this problem, AFAICS 52addcf is ok.

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