** Description changed: - 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. + 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 + 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 + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314213 Title: [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since upgrade to 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1314213/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
