[Bug 93390] [IVB] GPU hang after resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93390

--- Comment #6 from Don Bowman <don.waterloo at gmail.com> ---
I started seeing this ~4.4rc7 (might have been on rc6 but i don't think so...
for sure it was there in rc8).
I am on kubuntu 15.10 on Intel i5-3317U, using ubuntu kernel-mainline 4.4

Its not clear that suspend/resume is involved. It will happen while using it
w/o a resume, but may happen on each resume too(?)

its relatively frequent, ~1-2 times / hr.

$ uname -a
Linux don-s9 4.4.0-040400-generic #201601101930 SMP Mon Jan 11 00:32:41 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux


don at don-s9:~$ dmesg |grep -i drm
[    1.719271] [drm] Initialized drm 1.1.0 20060810
[    1.760871] [drm] Memory usable by graphics device = 2048M
[    1.760875] [drm] Replacing VGA console driver
[    1.767520] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.767523] [drm] Driver supports precise vblank timestamp query.
[    1.791601] [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor
0
[    1.930190] fbcon: inteldrmfb (fb0) is primary device
[    3.441414] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[30372.607262] [drm] stuck on render ring
[30372.607938] [drm] GPU HANG: ecode 7:0:0x85ffbff8, in chrome [2873], reason:
Ring hung, action: reset
[30372.607940] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[30372.607941] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[30372.607942] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[30372.607943] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[30372.607944] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[30372.608009] WARNING: CPU: 0 PID: 11390 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:11289
intel_mmio_flip_work_func+0x38e/0x3d0 [i915]()
[30372.608059]  snd_seq media iwlwifi x86_pkg_temp_thermal intel_powerclamp
btrtl btbcm coretemp snd_seq_device snd_timer btintel joydev bluetooth
input_leds serio_raw mei_me cfg80211 snd mei soundcore shpchp lpc_ich acpi_als
kfifo_buf industrialio kvm_intel kvm mac_hid irqbypass arc4 ppp_mppe parport_pc
ppdev lp parport autofs4 btrfs drbg ansi_cprng algif_skcipher af_alg dm_crypt
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 raid0 multipath linear i915 crct10dif_pclmul
crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
i2c_algo_bit cryptd drm_kms_helper syscopyarea psmouse sysfillrect sysimgblt
fb_sys_fops ahci drm libahci r8169 mii wmi fjes video
[30372.610069] drm/i915: Resetting chip after gpu hang

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