kernel-packages team mailing list archive

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

pureblood, as per http://download.lenovo.com/express/ddfm.html an update to your BIOS is available (1.39). If you update to this following https://help.ubuntu.com/community/BiosUpdate does it change anything?  If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Thank you for your understanding.

** Tags added: bios-outdated-1.39

** Tags added: kernel-bug-exists-upstream-3.15-rc3 regression-release

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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

** Summary changed:

- External DP1 monitor extremely unstable since upgrade to 14.04
+ [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since upgrade to 14.04

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1314213

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

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Since upgrade to 14.04, 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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1314213/+subscriptions