[Lenovo ThinkPad X220] Brightness control doesn't work
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu |
New
|
Medium
|
Unassigned |
Bug Description
After upgrading to Ubuntu 14.10 brightness control no longer works on Lenovo Thinkpad X220. Fn+Home/Fn+End doesn't work, the only way is to echo value to:
/sys/devices/
I use Awesome WM, but it doesn't seem to be related to Awesome.
---
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: narel 3706 F...m pulseaudio
/dev/snd/
DistroRelease: Ubuntu 14.10
EcryptfsInUse: Yes
HibernationDevice: RESUME=
InstallationDate: Installed on 2014-01-03 (318 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: LENOVO 4290PB8
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.138
Tags: utopic
Uname: Linux 3.16.0-24-generic x86_64
UpgradeStatus: Upgraded to utopic on 2014-11-07 (10 days ago)
UserGroups: adm audio cdrom dialout dip libvirtd lpadmin plugdev pulse pulse-access remote sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/19/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET63WW (1.33 )
dmi.board.
dmi.board.name: 4290PB8
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 4290PB8
dmi.product.
dmi.sys.vendor: LENOVO
affects: | ubuntu-community-website → ubuntu |
tags: | added: bios-outdated-1.39 |
summary: |
- Thnikpad X220 - brightness control doesn't work + [Lenovo ThinkPad X220] Brightness control doesn't work |
narel, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1391153