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[morryis <1385810@xxxxxxxxxxxxxxxxxx>]

A quick workaround is disabling hardware acceleration in chromium
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https://bugs.launchpad.net/bugs/1385810

Title:
  Chromium causes drm/i915 stuck on render ring

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Reproducible example: visit http://ello.co/jondcook in Chromium and
  the GPU will crash

  Linux 4720z 3.13.0-38-generic #65~precise1-Ubuntu SMP Thu Oct 9 19:24:05 UTC 2014 i686 i686 i386 GNU/Linux
  NAME="Ubuntu"
  VERSION="12.04.5 LTS, Precise Pangolin"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu precise (12.04.5 LTS)"
  VERSION_ID="12.04"
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=12.04
  DISTRIB_CODENAME=precise
  DISTRIB_DESCRIPTION="Ubuntu 12.04.5 LTS"

  Chromium Version 37.0.2062.120 Ubuntu 12.04 (281580)

  Oct 26 00:43:08 4720z kernel: [242523.988084] [drm] stuck on render ring
  Oct 26 00:43:08 4720z kernel: [242523.988096] [drm] GPU crash dump saved to /sys/class/drm/card0/error
  Oct 26 00:43:08 4720z kernel: [242523.988101] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
  Oct 26 00:43:08 4720z kernel: [242523.988106] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
  Oct 26 00:43:08 4720z kernel: [242523.988110] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
  Oct 26 00:43:08 4720z kernel: [242523.988115] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
  Oct 26 00:43:08 4720z kernel: [242523.989889] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0xd32a000 ctx 0) at 0xd32aadc
  Oct 26 00:43:08 4720z kernel: [242524.496024] [drm:i915_reset] *ERROR* Failed to reset chip.
  Oct 26 00:43:18 4720z kernel: [242533.988090] [drm:i915_gem_wait_for_error] *ERROR* Timed out waiting for the gpu reset to complete
  Oct 26 00:43:18 4720z kernel: [242533.988107] [drm:i915_gem_wait_for_error] *ERROR* Timed out waiting for the gpu reset to complete
  Oct 26 00:43:18 4720z kernel: [242534.148091] [drm:i915_gem_wait_for_error] *ERROR* Timed out waiting for the gpu reset to complete
  Oct 26 00:43:18 4720z kernel: [242534.204095] [drm] GMBUS [i915 gmbus vga] timed out, falling back to bit banging on pin 2

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