Brightness hotkeys dont work

[Chris Hornby]

This is a Novatech V13 laptop.

Brightness hotkeys (fn-F8 and fn-F9) don't work. The brightness applet does work, and brightness can be controlled through xbacklight.

acpi_listen does not detect any events when these keys are pressed.

WORKAROUND: boot with acpi=off

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.36
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: oem 1235 F.... pulseaudio
 /dev/snd/pcmC0D0p: oem 1235 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf8700000 irq 22'
   Mixer name : 'Intel G45 DEVCTG'
   Components : 'HDA:10ec0272,15588430,00100001 HDA:80862802,80860101,00100000'
   Controls : 21
   Simple ctrls : 11
Date: Tue Jul 6 11:51:53 2010
HibernationDevice: RESUME=UUID=86cb6c4c-1011-4bda-b42a-cb1b478e815a
MachineType: CLEVO CO. W830T/W840T
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=588a0b78-f2b6-47e8-92f3-3e872ffd2555 ro quiet splash
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:

SourcePackage: linux
WifiSyslog:
 Jul 6 11:51:12 oem-laptop kernel: [ 526.249364] ===>rtl8192se_link_change():ieee->iw_mode is 2
 Jul 6 11:51:13 oem-laptop kernel: [ 527.870295] ===>rtl8192se_link_change():ieee->iw_mode is 2
dmi.bios.date: 09/04/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.asset.tag: Tag 12345
dmi.board.name: W830T/W840T
dmi.board.vendor: CLEVO CO.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd09/04/2009:svnCLEVOCO.:pnW830T/W840T:pvrNotApplicable:rvnCLEVOCO.:rnW830T/W840T:rvrNotApplicable:cvnNoEnclosure:ct9:cvrN/A:
dmi.product.name: W830T/W840T
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO CO.

[Chris Hornby (chris-orphix)]

A bit more info: If I boot the laptop with acpi=off, then the brightness hotkeys work.

[Jeremy Foshee (jeremyfoshee)]

Hi Chris,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Chris Hornby (chris-orphix)]

Tested with the following kernels with these results:
Lucid 2.6.34-020634rc7-generic No difference at all
Lucid 2.6.35-020635rc1-generic No difference at all

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Srinath Madhavan (msrinath80)]

This bug should probably be closed. As explained in this[1] thread, one needs to append "acpi_osi=" to the grub boot command line in order to get the brightness hotkeys to work on the lemur (which is basically a Clevo W840T1).

References:
[1] http://ubuntuforums.org/showthread.php?t=1543836&highlight=lemur+acpi_osi

[Chris Hornby (chris-orphix)]

Unfortunately adding acpi_osi=Linux to the grub boot command doesn't work (neither do any of the other acpi_osi= options).

Also, this laptop is a W830T, not a W830T1 (could be the difference?).

Any other suggestions gratefully received!

Regards

[Srinath Madhavan (msrinath80)]

I take it that you also tried adding just "acpi_osi=" without anything after the "equl to" symbol as mentioned in that thread? Just confirming. Sorry if this is redundant.

[Chris Hornby (chris-orphix)]

Okay, if I add just "acpi_osi=" then the hotkeys work.

For info the brightness applet no longer works, and it seems as though the power manager no longer dims the display when idle.

Other power management functions appear to work though.

Cheers

[penalvch (penalvch)]

Chris Hornby, thank you for reporting this and helping make Ubuntu better. This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command in the development release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux <replace-with-bug-number>

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.

Please let us know your results. Thanks in advance.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]