Alexander Vinbæk Strand, thank you for reporting this and helping make
Ubuntu better.

Could you please run the following command once from a terminal by ensuring you 
have the package xdiagnose installed, and that you click the Yes button for 
attaching additional debugging information:
apport-collect -p xorg 1572667

When reporting xorg related bugs in the future, please do so via the
above method. You can learn more about this functionality at
https://wiki.ubuntu.com/ReportingBugs.

** This bug is no longer a duplicate of bug 1550779
   [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches

** Package changed: xserver-xorg-video-intel (Ubuntu) => xorg (Ubuntu)

** Changed in: xorg (Ubuntu)
   Importance: Medium => Low

** Changed in: xorg (Ubuntu)
       Status: Confirmed => Incomplete

** Tags removed: apport-collected compiz-0.9 ubuntu

** Attachment removed: "xdpyinfo.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647188/+files/xdpyinfo.txt

** Attachment removed: "XorgLogOld.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647186/+files/XorgLogOld.txt

** Attachment removed: "XorgLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647185/+files/XorgLog.txt

** Attachment removed: "UnitySupportTest.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647184/+files/UnitySupportTest.txt

** Attachment removed: "UdevDb.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647183/+files/UdevDb.txt

** Attachment removed: "Xrandr.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647187/+files/Xrandr.txt

** Attachment removed: "ProcModules.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647182/+files/ProcModules.txt

** Attachment removed: "ProcInterrupts.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647181/+files/ProcInterrupts.txt

** Attachment removed: "ProcEnviron.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647180/+files/ProcEnviron.txt

** Attachment removed: "MonitorsUser.xml.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647178/+files/MonitorsUser.xml.txt

** Attachment removed: "ProcCpuinfo.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647179/+files/ProcCpuinfo.txt

** Attachment removed: "Lsusb.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647177/+files/Lsusb.txt

** Attachment removed: "Lspci.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647176/+files/Lspci.txt

** Attachment removed: "LightdmLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647175/+files/LightdmLog.txt

** Attachment removed: "LightdmGreeterLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647173/+files/LightdmGreeterLog.txt

** Attachment removed: "LightdmDisplayLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647172/+files/LightdmDisplayLog.txt

** Attachment removed: "LightdmGreeterLogOld.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647174/+files/LightdmGreeterLogOld.txt

** Attachment removed: "GconfCompiz.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647170/+files/GconfCompiz.txt

** Attachment removed: "JournalErrors.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647171/+files/JournalErrors.txt

** Attachment removed: "Dependencies.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647168/+files/Dependencies.txt

** Attachment removed: "CurrentDmesg.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647167/+files/CurrentDmesg.txt

** Attachment removed: "DpkgLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647169/+files/DpkgLog.txt

** Attachment removed: "BootLog.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4647166/+files/BootLog.txt

** Attachment removed: "stacktrace.txt"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+attachment/4642062/+files/stacktrace.txt

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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