I tested with kernel 3.8.0 from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.8-raring/, and it does not fix the issue.
Worse, with kernel 3.8 the brightness keys do not show the on screen
display, and do not generate acpi events. When running acpi_listen,
pressing Fn + F5 or Fn + F6 does does not generate any event.
Tested again with kernel 3.5.0-26 - not fixed, the attached patch fix
the brightness buttons.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
** Attachment removed: "fix the brightness keys on the Asus Eee PC X101CH"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1132261/+attachment/3543848/+files/backlight-keys-asus-x101ch.patch
** Description changed:
The brightness keys (Fn + F5, Fn + F6) did not work under 12.04. After
upgrading to 12.10 they still do not work.
Pressing the brightness keys show the nice display of the brightnesss,
but displayed brightness is not correct and it does not change up or
down.
Changing the brightness manually by writing to /sys/class/backlight/psb-
bl/brightness works.
- The issue is caused by:
- 1. The path to the backlight directory is wrong
- 2. The acpi events are not correct - they are not triggered when pressing the
brightness keys.
- ---
+ ---
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: nirs 13489 F.... pulseaudio
- /dev/snd/pcmC0D0p: nirs 13489 F...m pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: nirs 13489 F.... pulseaudio
+ /dev/snd/pcmC0D0p: nirs 13489 F...m pulseaudio
DistroRelease: Ubuntu 12.10
HibernationDevice: RESUME=UUID=4cebec9a-7504-469c-8677-d25304edfd40
InstallationDate: Installed on 2012-06-08 (261 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386
(20120423)
MachineType: ASUSTeK COMPUTER INC. X101CH
MarkForUpload: True
Package: linux (not installed)
ProcFB: 0 psbfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-25-generic
root=UUID=8a182610-1789-4b8d-b2e3-18f776104030 ro
crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.5.0-25.38-generic 3.5.7.4
RelatedPackageVersions:
- linux-restricted-modules-3.5.0-25-generic N/A
- linux-backports-modules-3.5.0-25-generic N/A
- linux-firmware 1.95
+ linux-restricted-modules-3.5.0-25-generic N/A
+ linux-backports-modules-3.5.0-25-generic N/A
+ linux-firmware 1.95
Tags: quantal
Uname: Linux 3.5.0-25-generic i686
UpgradeStatus: Upgraded to quantal on 2013-02-22 (1 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 01/06/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X101CH.0501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X101CH
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: x.x
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrX101CH.0501:bd01/06/2012:svnASUSTeKCOMPUTERINC.:pnX101CH:pvrx.x:rvnASUSTeKCOMPUTERINC.:rnX101CH:rvrx.xx:cvnASUSTeKCOMPUTERINC.:ct10:cvrx.x:
dmi.product.name: X101CH
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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https://bugs.launchpad.net/bugs/1132261
Title:
Brightnesst keys do not work on Asus Eee PC X101CH
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