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

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  Secondary monitor blanks out randomly

Status in linux package in Ubuntu:

Bug description:
  When hooked up to a second monitor it will blank out occastionally.
  Same issue on two external monitors. Both hooked up via MiniDisplay

  Every time it happens i have a the following log in my dmesg:

  [47192.964713] [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
  *ERROR* CPU pipe B FIFO underrun

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: linux-generic
  ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
  Uname: Linux 4.8.0-26-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
   /dev/snd/controlC2:  bbennett   2693 F.... pulseaudio
   /dev/snd/controlC1:  bbennett   2693 F.... pulseaudio
   /dev/snd/controlC0:  bbennett   2693 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Oct 27 16:03:21 2016
  HibernationDevice: RESUME=UUID=872ed834-8bdc-4c58-a9ab-6c0ad9ec3ca8
  InstallationDate: Installed on 2016-10-17 (10 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  MachineType: LENOVO 20FRS0XT00
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-26-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
   linux-restricted-modules-4.8.0-26-generic N/A
   linux-backports-modules-4.8.0-26-generic  N/A
   linux-firmware                            1.161
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 03/30/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1FET38W (1.12 )
  dmi.board.asset.tag: Not Available 20FRS0XT00
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
dmi:bvnLENOVO:bvrN1FET38W(1.12):bd03/30/2016:svnLENOVO:pn20FRS0XT00:pvrThinkPadX1Carbon4th:rvnLENOVO:rn20FRS0XT00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: 20FRS0XT00
  dmi.product.version: ThinkPad X1 Carbon 4th
  dmi.sys.vendor: LENOVO

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