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[Daniel-ffwll <1282867@xxxxxxxxxxxxxxxxxx>]

It's a mesa thing, it's me being confused since the bugzilla update
somehow ended up in my kernel bugs folder.

For bisecting mesa you can simply build from sources without any need to
install anything. You only need to set LIBGL_DRIVERS_PATH to the
i965_dri.so binary built by mesa, e.g.

LIBGL_DRIVERS_PATH=~/home/mesa/src/mesa/drivers/dri/i965/.libs/ glxinfo

Mesa built from git has the git version tag in the Gl version string
embedded, so you can check you run the right thing.

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https://bugs.launchpad.net/bugs/1282867

Title:
  Many bugs in rendering with lockups, likely caused by SNA

Status in The Linux Kernel:
  Incomplete
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After the latest kernel upgrade, my system has many graphical
  glitches, and is locking up frequently. The dmesg output has errors
  like these:

  [ 1951.568672] Watchdog[2753]: segfault at 0 ip 00007fe00773a32e sp 00007fdff869f680 error 6 in chrome[7fe003cbe000+5dd9000]
  [ 1959.241676] [drm] stuck on render ring
  [ 1959.241685] [drm] GPU crash dump saved to /sys/class/drm/card0/error
  [ 1959.241686] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
  [ 1959.241687] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
  [ 1959.241688] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
  [ 1959.241689] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
  [ 1959.244266] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x3dc32000 ctx 17) at 0x3dc32c48
  [ 3964.330034] perf samples too long (2503 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
  [ 4849.028446] [drm] stuck on render ring
  [ 4849.028492] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x565c2000 ctx 17) at 0x565c2c48
  [ 4861.093551] Watchdog[5226]: segfault at 0 ip 00007fc00d36f32e sp 00007fbffe2d4680 error 6 in chrome[7fc0098f3000+5dd9000]
  [ 4863.020198] [drm] stuck on render ring
  [ 4863.020255] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x3dc32000 ctx 17) at 0x3dc32c48
  [ 4893.028245] [drm] stuck on render ring
  [ 4893.028295] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x4cbed000 ctx 10) at 0x4cbedc98
  [ 4899.041855] [drm] stuck on render ring
  [ 4899.041900] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0xea3d000 ctx 10) at 0xea3dc98
  [ 4899.041903] [drm:i915_context_is_banned] *ERROR* context hanging too fast, declaring banned!
  [ 5833.173837] warning: `VBoxHeadless' uses 32-bit capabilities (legacy support in use)
  [ 5833.326542] device vboxnet0 entered promiscuous mode
  [ 6429.476175] [drm] stuck on render ring
  [ 6488.455986] [drm] stuck on render ring
  [ 6547.507818] [drm] stuck on render ring
  [ 6615.490047] [drm] stuck on render ring

  I am not sure if the xserver-xorg-video-intel ricver was also updated
  at the same time. This is the version in use:

  rdhruva@ubuntu:~$ apt-cache policy xserver-xorg-video-intel
  xserver-xorg-video-intel:
    Installed: 2:2.99.910-0ubuntu1
    Candidate: 2:2.99.910-0ubuntu1
    Version table:
   *** 2:2.99.910-0ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-11-generic 3.13.0-11.31
  ProcVersionSignature: Ubuntu 3.13.0-11.31-generic 3.13.3
  Uname: Linux 3.13.0-11-generic x86_64
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rdhruva    2154 F.... pulseaudio
   /dev/snd/pcmC0D0p:   rdhruva    2154 F...m pulseaudio
  CurrentDesktop: KDE
  Date: Thu Feb 20 19:29:20 2014
  HibernationDevice: RESUME=UUID=33c83ff3-ead7-4122-a1f0-9602e848cb80
  InstallationDate: Installed on 2014-01-24 (27 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140121.1)
  MachineType: LENOVO 2356EF2
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-11-generic root=UUID=9a425350-3b9f-45f7-9587-97f5e539c7e6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-11-generic N/A
   linux-backports-modules-3.13.0-11-generic  N/A
   linux-firmware                             1.125
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/16/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G7ET98WW (2.58 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2356EF2
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: 2045260
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG7ET98WW(2.58):bd12/16/2013:svnLENOVO:pn2356EF2:pvrThinkPadT430s:rvnLENOVO:rn2356EF2:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2356EF2
  dmi.product.version: ThinkPad T430s
  dmi.sys.vendor: LENOVO

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