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[webbertiger <webbertiger@xxxxxxxxx>]

I have this issue on Ubuntu 14.04.4 with kernel 4.4.0-22-generic #39
too. Now I'm rolling back to kernel 3.13.0-86-generic #131. Will update
if I see this issue again.

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https://bugs.launchpad.net/bugs/1577099

Title:
  [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
  FIFO underrun

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Graphical glitches in Firefox.

  Gere is dmesg log when it happens.
  [97970.020983] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
  [97970.021023] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun

  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  linux-image-generic:
    Установлен: 4.4.0.21.22
    Кандидат:   4.4.0.21.22

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   sam        2091 F...m pulseaudio
   /dev/snd/controlC0:  sam        2091 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun May  1 12:23:21 2016
  HibernationDevice: RESUME=UUID=478fdfc2-ea5f-4e80-a404-cf3230067630
  InstallationDate: Installed on 2016-04-16 (15 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160415)
  MachineType: LENOVO 25372A2
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=b5bacb2b-487f-4164-ba6f-e8d22ab6c97e ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET80WW (1.40 )
  dmi.board.name: 25372A2
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6IET80WW(1.40):bd12/01/2011:svnLENOVO:pn25372A2:pvrThinkPadT410:rvnLENOVO:rn25372A2:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 25372A2
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO

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