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[Michael Stucki <mundaun@xxxxxx>]

Someone marked this as a duplicate of #1274779 but I do not agree. This
one is about a kernel fix (which only needs to be backported), whereas
the other issue affects the xorg driver.

The problem described here is still valid for me on Ubuntu 14.04. Can
anyone please backport the fix from above?

** This bug is no longer a duplicate of bug 1274779
   [ivb] hang on pageflip (IPEHR: 0x0a000001 or 0x0a080001 depending on pipe)

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https://bugs.launchpad.net/bugs/1384597

Title:
  [drm/i915]  stuck on render ring

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Chrome hangs with a "stuck on render ring" message on Ubuntu 14.04,
  3.13.0-37-generic

  This bug has been fixed upstream:
  https://www.libreoffice.org/bugzilla/show_bug.cgi?id=77104

  dmesg:
  [21103.988448] [drm] Module unloaded
  [21103.992678] bbswitch: disabling discrete graphics
  [21103.992710] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131115/nsarguments-95)
  [21104.005522] pci 0000:01:00.0: Refused to change power state, currently in D0
  [21164.507889] bbswitch: enabling discrete graphics
  [21165.039148] [drm] Initialized nvidia-drm 0.0.0 20130102 for 0000:01:00.0 on minor 1
  [21165.039158] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
  [21165.162607] vgaarb: this pci device is not a vga device
  [21165.163252] nvidia 0000:01:00.0: irq 50 for MSI/MSI-X
  [21165.169122] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131115/nsarguments-95)
  [21166.762394] vgaarb: this pci device is not a vga device
  [21167.525348] [drm] Module unloaded
  [21167.530952] bbswitch: disabling discrete graphics
  [21167.530968] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131115/nsarguments-95)
  [21167.545277] pci 0000:01:00.0: Refused to change power state, currently in D0
  [21172.553983] bbswitch: enabling discrete graphics
  [21173.008283] [drm] Initialized nvidia-drm 0.0.0 20130102 for 0000:01:00.0 on minor 1
  [21173.008289] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
  [21173.027763] vgaarb: this pci device is not a vga device
  [21173.028502] nvidia 0000:01:00.0: irq 50 for MSI/MSI-X
  [21173.034301] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131115/nsarguments-95)
  [21173.975886] vgaarb: this pci device is not a vga device
  [26686.550084] [drm] stuck on render ring
  [26686.550091] [drm] GPU crash dump saved to /sys/class/drm/card0/error
  [26686.550092] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
  [26686.550094] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
  [26686.550095] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
  [26686.550096] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.

  Details of my system:

  $ uname -a
  Linux fraptop 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  $ sudo lshw -c video
    *-display
         description: 3D controller
         product: GF117M [GeForce 610M/710M/820M / GT 620M/625M/630M/720M]
         vendor: NVIDIA Corporation
         physical id: 0
         bus info: pci@0000:01:00.0
         version: a1
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list rom
         configuration: driver=nvidia latency=0
         resources: irq:50 memory:d0000000-d0ffffff memory:a0000000-afffffff memory:b0000000-b1ffffff ioport:3000(size=128) memory:b2000000-b207ffff
    *-display
         description: VGA compatible controller
         product: 3rd Gen Core processor Graphics Controller
         vendor: Intel Corporation
         physical id: 2
         bus info: pci@0000:00:02.0
         version: 09
         width: 64 bits
         clock: 33MHz
         capabilities: msi pm vga_controller bus_master cap_list rom
         configuration: driver=i915 latency=0
         resources: irq:48 memory:d1000000-d13fffff memory:c0000000-cfffffff ioport:4000(size=64)

  $ modinfo i915
  filename:       /lib/modules/3.13.0-37-generic/kernel/drivers/gpu/drm/i915/i915.ko
  license:        GPL and additional rights
  description:    Intel Graphics
  author:         Tungsten Graphics, Inc.
  license:        GPL and additional rights
  srcversion:     594AF6054E9069A37423B0F
  intree:         Y
  vermagic:       3.13.0-37-generic SMP mod_unload modversions

  $ lsmod | grep nvidia
  nvidia              10675249  27
  drm                   303102  7 i915,drm_kms_helper,nvidia

  $ apt-cache show nvidia-331
  Package: nvidia-331
  Priority: optional
  Section: restricted/misc
  Installed-Size: 177004
  Maintainer: Ubuntu Core Developers <ubuntu-devel-discuss@xxxxxxxxxxxxxxxx>
  Architecture: amd64
  Source: nvidia-graphics-drivers-331
  Version: 331.38-0ubuntu7.1

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