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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1514198

Title:
  Gpu hung on i915.

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hello,
  my gpu, an old GMA945 on i915, randomly crashes.
  This is an extract of the kernel log reporting the crash.
  I have to admit, to be precise, that this defect has been occuring just after upgrading to 15.10 and kernel 4.x; before of that, with ubuntu 15.04, it never occurred.
  Thanks.

  Nov  8 00:12:22 Bell kernel: [11515.988144] [drm] stuck on render ring
  Nov  8 00:12:22 Bell kernel: [11515.994230] [drm] GPU HANG: ecode 3:0:0x6affbfc1, in Xorg [1041], reason: Ring hung, action: reset
  Nov  8 00:12:22 Bell kernel: [11515.994238] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
  Nov  8 00:12:22 Bell kernel: [11515.994242] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
  Nov  8 00:12:22 Bell kernel: [11515.994246] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
  Nov  8 00:12:22 Bell kernel: [11515.994249] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
  Nov  8 00:12:22 Bell kernel: [11515.994253] [drm] GPU crash dump saved to /sys/class/drm/card0/error
  Nov  8 00:12:22 Bell kernel: [11515.994424] ------------[ cut here ]------------
  Nov  8 00:12:22 Bell kernel: [11515.994511] WARNING: CPU: 0 PID: 5732 at /build/linux-V0KBlg/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:3294 intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]()
  Nov  8 00:12:22 Bell kernel: [11515.994517] WARN_ON(ret)
  Nov  8 00:12:22 Bell kernel: [11515.994522] Modules linked in: nvram msr pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media acer_wmi sparse_keymap arc4 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep ath5k snd_pcm ath snd_seq_midi mac80211 snd_seq_midi_event snd_rawmidi cfg80211 snd_seq snd_seq_device snd_timer snd lpc_ich input_leds joydev soundcore serio_raw shpchp mac_hid coretemp parport_pc ppdev lp parport autofs4 hid_generic i915 usbhid hid psmouse i2c_algo_bit ahci drm_kms_helper libahci drm atl1c wmi video
  Nov  8 00:12:22 Bell kernel: [11515.994652] CPU: 0 PID: 5732 Comm: kworker/u4:1 Tainted: G           OE   4.2.0-17-generic #21-Ubuntu
  Nov  8 00:12:22 Bell kernel: [11515.994658] Hardware name: Packard Be DOTS            /DOTS            , BIOS V1.29 12/18/2010
  Nov  8 00:12:22 Bell kernel: [11515.994731] Workqueue: i915-hangcheck i915_hangcheck_elapsed [i915]
  Nov  8 00:12:22 Bell kernel: [11515.994742]  c1a629a7 9f398f53 00000000 f1d79d48 c175dae1 f1d79d88 f1d79d78 c106a687
  Nov  8 00:12:22 Bell kernel: [11515.994757]  f8aaa8e9 f1d79da8 00001664 f8a9ca44 00000cde f8a3f22c f8a3f22c f5c48000
  Nov  8 00:12:22 Bell kernel: [11515.994773]  f5c50034 00000001 f1d79d94 c106a6fe 00000009 f1d79d88 f8aaa8e9 f1d79da8
  Nov  8 00:12:22 Bell kernel: [11515.994789] Call Trace:
  Nov  8 00:12:22 Bell kernel: [11515.994807]  [<c175dae1>] dump_stack+0x41/0x52
  Nov  8 00:12:22 Bell kernel: [11515.994819]  [<c106a687>] warn_slowpath_common+0x87/0xc0
  Nov  8 00:12:22 Bell kernel: [11515.994897]  [<f8a3f22c>] ? intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.994969]  [<f8a3f22c>] ? intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.994980]  [<c106a6fe>] warn_slowpath_fmt+0x3e/0x60
  Nov  8 00:12:22 Bell kernel: [11515.995037]  [<f8a3f22c>] intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.995076]  [<f885ffd4>] ? drm_modeset_lock_all_crtcs+0x84/0x90 [drm]
  Nov  8 00:12:22 Bell kernel: [11515.995133]  [<f8a405f4>] intel_crtc_disable_planes+0x34/0xf0 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.995189]  [<f8a4075a>] intel_prepare_reset+0x6a/0x80 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.995239]  [<f8a127b7>] i915_handle_error+0x147/0x6e0 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.995247]  [<c10be1bd>] ? log_store+0x1cd/0x210
  Nov  8 00:12:22 Bell kernel: [11515.995256]  [<c10bfa91>] ? vprintk_default+0x41/0x60
  Nov  8 00:12:22 Bell kernel: [11515.995306]  [<f8a12fd3>] i915_hangcheck_elapsed+0x233/0x410 [i915]
  Nov  8 00:12:22 Bell kernel: [11515.995315]  [<c10810b5>] process_one_work+0x155/0x3e0
  Nov  8 00:12:22 Bell kernel: [11515.995322]  [<c1081377>] worker_thread+0x37/0x490
  Nov  8 00:12:22 Bell kernel: [11515.995328]  [<c1081340>] ? process_one_work+0x3e0/0x3e0
  Nov  8 00:12:22 Bell kernel: [11515.995335]  [<c1086a56>] kthread+0xa6/0xc0
  Nov  8 00:12:22 Bell kernel: [11515.995343]  [<c1763741>] ret_from_kernel_thread+0x21/0x30
  Nov  8 00:12:22 Bell kernel: [11515.995350]  [<c10869b0>] ? kthread_create_on_node+0x170/0x170
  Nov  8 00:12:22 Bell kernel: [11515.995356] ---[ end trace c094a0d5cff2799e ]---
  Nov  8 00:12:22 Bell kernel: [11516.269198] drm/i915: Resetting chip after gpu hang

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-17-generic 4.2.0-17.21
  ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
  Uname: Linux 4.2.0-17-generic i686
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tony       1633 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sun Nov  8 15:10:29 2015
  HibernationDevice: RESUME=UUID=0c6d945a-d8b4-4dca-9dd8-354d3cae5b5f
  InstallationDate: Installed on 2015-08-04 (96 days ago)
  InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release i386 (20150422.1)
  MachineType: Packard Be DOTS
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic root=UUID=7c43ccfc-6000-484e-b552-03926fe9f632 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-17-generic N/A
   linux-backports-modules-4.2.0-17-generic  N/A
   linux-firmware                            1.149.1
  SourcePackage: linux
  UdevLog: Error: [Errno 2] File o directory non esistente: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2015-10-24 (15 days ago)
  dmi.bios.date: 12/18/2010
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.29
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: DOTS
  dmi.board.vendor: Acer
  dmi.board.version: V1.29
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.29
  dmi.modalias: dmi:bvnAcer:bvrV1.29:bd12/18/2010:svnPackardBe:pnDOTS:pvrV1.29:rvnAcer:rnDOTS:rvrV1.29:cvnAcer:ct10:cvrV1.29:
  dmi.product.name: DOTS
  dmi.product.version: V1.29
  dmi.sys.vendor: Packard Be

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