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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

pureblood, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1314213/comments/23
regarding this being fixed by returning configurations back to the
defaults. For future reference you can manage the status of your own
bugs by clicking on the current status in the yellow line and then
choosing a new status in the revealed drop down box. You can learn more
about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you
again for taking the time to report this bug and helping to make Ubuntu
better. Please submit any future bugs you may find.

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

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https://bugs.launchpad.net/bugs/1314213

Title:
  [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since
  upgrade to 14.04

Status in “xorg” package in Ubuntu:
  Invalid

Bug description:
  Since upgrade to 14.04, using my Dell BIZLINK DisplayPort to DVI Dual
  Link Adapter the external display on DP1 is extremely unstable. I get
  constant "[drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving
  up" messages over dmesg. I used to get those with 13.10, but there was
  no stability issue. Once the laptop (Lenovo X220) is connected to the
  monitor (resolution is 2560x1600), if I run any program like xrandr or
  unity-control-center, the system immediately reverts from the external
  display to the laptop display, and often crashes becoming
  unresponsive. Every time I run xrandr or unity-control-center, it
  triggers 20 "[drm:intel_dp_i2c_aux_ch] *ERROR* too many retries,
  giving up" messages in dmesg and if I am using the external monitor it
  further triggers a reproducible crash. It is possible that this might
  be related to the DVI->DP adapter I am using. Due to an unresolved
  bug, the correct EDID for the monitor is not recognized, and I have to
  manually add that after each boot.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  genovese   2538 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr 29 10:00:31 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-01-21 (463 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 42872WU
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=1f880233-e827-4c00-b11a-2c7a4eb76497 ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (10 days ago)
  dmi.bios.date: 08/31/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET64WW (1.34 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 42872WU
  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:bvr8DET64WW(1.34):bd08/31/2012:svnLENOVO:pn42872WU:pvrThinkPadX220:rvnLENOVO:rn42872WU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 42872WU
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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