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Message #77565
[Bug 1314213] Re: [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since upgrade to 14.04
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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