[Bug 83564] New: [drm] stuck on render ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83564

          Priority: medium
            Bug ID: 83564
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [drm] stuck on render ring
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: eebfrasn-bugreply at usa.net
          Hardware: x86 (IA32)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 105841
  --> https://bugs.freedesktop.org/attachment.cgi?id=105841&action=edit
GPU crash dump from /sys/class/drm/card0/error

After upgrading to Ubuntu 14.4 (with Linux 3.13 kernel), I am experiencing
frequent graphics failures. They come in several manifestations, I do not know
if they all have a common cause. The problems observed:

- kernel warning on boot and sometimes in other situations (e.g. screen shutoff
by power manager): WARNING: CPU: 2 PID: 334 at
/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:851
intel_wait_for_pipe_off+0x19b/0x1b0 [i915]

- (intermittent, infrequent) display does not wake up after going blank

- complete GUI rendering freeze on window move or resize. This one is easy to
reproduce and appears to trigger the '[drm] stuck on render ring' for which I
am opening this bug (as a new bug, as requested in the printk output).

Snippet from syslog:

Sep  6 19:15:04 sb kernel: [  131.782509] [drm] stuck on render ring
Sep  6 19:15:04 sb kernel: [  131.782520] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Sep  6 19:15:04 sb kernel: [  131.782524] [drm] GPU hangs can indicate a bug
anywhere in the entire gfx stack, including userspace.
Sep  6 19:15:04 sb kernel: [  131.782527] [drm] Please file a _new_ bug report
on bugs.freedesktop.org against DRI -> DRM/Intel
Sep  6 19:15:04 sb kernel: [  131.782529] [drm] drm/i915 developers can then
reassign to the right component if it's not a kernel issue.
Sep  6 19:15:04 sb kernel: [  131.782531] [drm] The gpu crash dump is required
to analyze gpu hangs, so please always attach it.
Sep  6 19:15:04 sb kernel: [  131.786068] [drm:i915_set_reset_status] *ERROR*
render ring hung inside bo (0x6ed1000 ctx 0) at 0x6ed1a44
Sep  6 19:15:10 sb kernel: [  137.776878] [drm] stuck on render ring
Sep  6 19:15:16 sb kernel: [  143.779239] [drm] stuck on render ring
Sep  6 19:15:16 sb kernel: [  143.779299] [drm:i915_set_reset_status] *ERROR*
render ring hung inside bo (0x6ed1000 ctx 0) at 0x6ed1a44
Sep  6 19:15:16 sb kernel: [  143.779304] [drm:i915_context_is_banned] *ERROR*
context hanging too fast, declaring banned!

The contents of /sys/class/drm/card0/error are attached.

My hardware: Intel Core i3 board using the CPU's integrated graphics
controller. The monitor is Dell 2560x1440 px, connected via DisplayPort (with
the Intel onboard graphics, only DP can drive this resolution at 60Hz).

00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor
Integrated Graphics Controller [8086:0042] (rev 12)

processor    : 3
vendor_id    : GenuineIntel
cpu family    : 6
model        : 37
model name    : Intel(R) Core(TM) i3 CPU         530  @ 2.93GHz
stepping    : 2
microcode    : 0x9
cpu MHz        : 1197.000
cache size    : 4096 KB
physical id    : 0
siblings    : 4
core id        : 2
cpu cores    : 2
apicid        : 5
initial apicid    : 5
fdiv_bug    : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 11
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm
constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64
monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm
arat dtherm tpr_shadow vnmi flexpriority ept vpid
bogomips    : 5866.38
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual

$ uname -a
Linux sb 3.13.0-35-lowlatency #62-Ubuntu SMP PREEMPT Fri Aug 15 02:28:37 UTC
2014 i686 i686 i686 GNU/Linux

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