Roger Kind Kristiansen, thank you for reporting this and helping make Ubuntu
better. Could you please test the latest upstream kernel available from the
very top line at the top of the page (not the daily folder) following
https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional
upstream developers to examine the issue. Once you've tested the upstream
kernel, please comment on which kernel version specifically you tested. If this
bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested exactly
shown as:
kernel-fixed-upstream-3.17-rc6
This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.
** Summary changed:
- Brightness to minimum and controls disabled when undocking X220
+ [Lenovo ThinkPad X220] Brightness to minimum and controls disabled when
undocking
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1377436
Title:
[Lenovo ThinkPad X220] Brightness to minimum and controls disabled
when undocking
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
To reproduce, remove the X220 from the dock. The brightness is set to
minimum (the screen is nearly unreadable) and the brightness control
is broken, you can't adjust it by hardware keys.
The symptom is fixed by docking and undocking again.
This is the same problem as discussed
https://bugs.launchpad.net/linux/+bug/1308674/, where I was asked to
open this new report.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-36-generic 3.13.0-36.63
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: rkk 2514 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Oct 4 14:40:20 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-12-01 (1037 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: LENOVO 42914CG
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-36-generic
root=UUID=36e15617-ebcb-47e7-9c57-582dda4bb198 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-36-generic N/A
linux-backports-modules-3.13.0-36-generic N/A
linux-firmware 1.127.7
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-08-24 (41 days ago)
dmi.bios.date: 07/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET69WW (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42914CG
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:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn42914CG:pvrThinkPadX220:rvnLENOVO:rn42914CG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42914CG
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
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