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 ** Tags added: bios-outdated-1.39 ** Tags added: kernel-bug-exists-upstream-3.15-rc3 regression-release ** Changed in: linux (Ubuntu) Importance: Undecided =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 -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
