[Bug 89915] New: GPU HANG, reason: Ring hung, action: reset - Often after suspension

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89915

            Bug ID: 89915
           Summary: GPU HANG, reason: Ring hung, action: reset - Often
                    after suspension
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jfrusciante at tiscali.it
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114884
  --> https://bugs.freedesktop.org/attachment.cgi?id=114884&action=edit
GPU crash dump

Hello,

I had Ubuntu 14.04, kernel 3.16, on Asus UX303LN-R4281H (Optimus Intel +
Nvidia, nvidia drivers currently not installed). I updated to 4.0.0rc6 to solve
a few issues not related with graphics (e.g. touchpad). After the update,
resuming after suspend has some problems. System resumes and then freezes for a
few seconds. Then unfreezes and in the kernel log I find:

[   71.845023] [drm] stuck on render ring
[   71.845672] [drm] GPU HANG: ecode 8:0:0xfffffffe, in Xorg [1284], reason:
Ring hung, action: reset
[   71.845674] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[   71.845674] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[   71.845675] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[   71.845676] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[   71.845676] [drm] GPU crash dump saved to /sys/class/drm/card0/error

After a couple minutes, kernel log is full of:

drm:hsw_unclaimed_reg_detect.isra.10 [i915]] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.

Note: I was using Chrome in the while, two tabs were probably using
acceleration (e.g. 3d gmaps). I don't know if it is related, but some minutes
after the system froze completely, without even responding to sysreqs. Never
happened before kernel upgrade.

Now I rebooted with mmio.debug=1, suspended and resumed: it freezed again for
some seconds. Part of dmesg | grep i915:

[   39.884700] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
...
[   71.852974] drm/i915: Resetting chip after gpu hang
[   77.848497] [drm:i915_set_reset_status.part.38 [i915]] *ERROR* gpu hanging
too fast, banning!
[   77.854831] drm/i915: Resetting chip after gpu hang

Attaching GPU crash dump and dmesg after reboot.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20150406/d56bf229/attachment.html>