This is not an issue in the current Saucy kernel 3.11.0-6-generic.
** Tags added: kernel-fixed-upstream-v3.11
** Tags added: apport-collected
** Description changed:
[Problem]:
Pushing the brightness down key causes the brightess to immediately go
to a value of 0 yet the actual brightness has not change on the screen.
Pushing brightness up causes the brightness value to go up to around
5% and immediately sets the actual corresponding brightness level on the
display.
At this point pressing the brightness up or down keys causes the
brightness slider to jump between 0 and 5% but will not go any higher
value setting.
You have to open gnome-control-center brightness and lock to reset the
brightness to desired value.
This particular bug is present on a few recent lenovos models.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.8.0-29-generic 3.8.0-29.42~precise1 [modified:
boot/vmlinuz-3.8.0-29-generic]
ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Tue Sep 10 11:45:00 2013
InstallationMedia: Ubuntu 12.04.3 LTS Precise Pangolin - Release amd64
(20130820.1)
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-lts-raring
UpgradeStatus: No upgrade log present (probably fresh install)
+ ---
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version
k3.8.0-29-generic.
+ ApportVersion: 2.0.1-0ubuntu17.4
+ Architecture: amd64
+ ArecordDevices:
+ List of CAPTURE Hardware Devices
+ card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
+Subdevices: 1/1
+Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+ USERPID ACCESS COMMAND
+ /dev/snd/controlC0: ubuntu 1563 F pulseaudio
+ CRDA: Error: [Errno 2] No such file or directory
+ Card0.Amixer.info:
+ Card hw:0 'PCH'/'HDA Intel PCH at 0xe281 irq 48'
+Mixer name : 'Intel PantherPoint HDMI'
+Components : 'HDA:10ec0269,17aa0001,00100203
HDA:80862806,80860101,0010'
+Controls : 36
+Simple ctrls : 12
+ Card29.Amixer.info:
+ Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
unknown'
+Mixer name : 'ThinkPad EC (unknown)'
+Components : ''
+Controls : 1
+Simple ctrls : 1
+ Card29.Amixer.values:
+ Simple mixer control 'Console',0
+Capabilities: pswitch pswitch-joined penum
+Playback channels: Mono
+Mono: Playback [on]
+ DistroRelease: Ubuntu 12.04
+ HibernationDevice: RESUME=UUID=fbd820f1-0c28-488a-b1a5-90e425ff897e
+ InstallationMedia: Ubuntu 12.04.3 LTS Precise Pangolin - Release amd64
(20130820.1)
+ MachineType: LENOVO 20AX25C
+ MarkForUpload: True
+ Package: linux (not installed)
+ ProcEnviron:
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic
root=UUID=5cea22e2-4925-4f99-8469-1af7456106b3 ro quiet splash initcall_debug
vt.handoff=7
+ ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
+ RelatedPackageVersions:
+ linux-restricted-modules-3.8.0-29-generic N/A
+ linux-backports-modules-3.8.0-29-generic N/A
+ linux-firmware1.79.6
+ Tags: precise running-unity
+ Uname: Linux 3.8.0-29-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
+ dmi.bios.date: 03/26/2013
+ dmi.bios.vendor: LENOVO
+ dmi.bios.version: HFET25WW (1.02 )
+ dmi.board.asset.tag: Not Available
+ dmi.board.name: 20AX25C
+ dmi.board.vendor: LENOVO
+ dmi.board.version: Win8 STD PRC DPK TPG
+ dmi.chassis.asset.tag: No Asset Information
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: LENOVO
+ dmi.chassis.version: Not Available
+ dmi.modalias:
dmi:bvnLENOVO:bvrHFET25WW(1.02):bd03/26/2013:svnLENOVO:pn20AX25C:pvrThinkPadS3-S431:rvnLENOVO:rn20AX25C:rvrWin8STDPRCDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
+ dmi.product.name: 20AX25C
+ dmi.product.version: ThinkPad S3-S431
+ dmi.sys.vendor: LENOVO
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https://bugs.launchpad.net/bugs/1223421
Title:
[Lenovo S431, 531, S5]: Brightness keys to not function properly.
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