[karmic on Vaio VGN Z21MN] Cannot get laptop panel brightness

[Raphael Gradenwitz]

Binary package hint: linux-image-2.6.30-10-generic

The Sony Z-Series laptop has two graphic chips: GeForce 9300M GS and Intel Mobile 4 Series Chipset Integrated Graphics Controler.
I am using (and writing here about) the Intel-Graphics. It runs with the i915 Kernel Driver/Module. In /etc/modules I added a line:
options i915 modeset=1
and that works extremely good and fast but since Kernel Update from 2.6.30-9 to 2.6.30-10 the Keyboard brightness buttons as well as the (Gnome) "Power Manager Brightness Applet 2.27.1" does not work and when I mouse-over the brightness applet in the panel it pops the message "Cannot get laptop panel brightness"
When I start with an older Kernel everything works.

[Raphael Gradenwitz (raphael-gradenwitz)]

Architecture: amd64
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=c87be8d5-d5c2-405d-af48-3bb6a801334f
MachineType: Sony Corporation VGN-Z21MN_B
Package: linux-image-2.6.30-10-generic 2.6.30-10.12
PackageArchitecture: amd64
ProcCmdLine: root=UUID=b4acd5c9-258f-47fc-8a8c-0f497f6f5137 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=de_DE.UTF-8
ProcVersionSignature: Ubuntu 2.6.30-10.12-generic
RelatedPackageVersions: linux-backports-modules-2.6.30-10-generic N/A
Uname: Linux 2.6.30-10-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 03/23/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: R2168M3
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnINSYDE:bvrR2168M3:bd03/23/2009:svnSonyCorporation:pnVGN-Z21MN_B:pvrJ003J6CJ:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VGN-Z21MN_B
dmi.product.version: J003J6CJ
dmi.sys.vendor: Sony Corporation

[Raphael Gradenwitz (raphael-gradenwitz)]

adding "acpi_backlight=vendor" as kernel option fixed it.

This can be closed.

[Jeremy Foshee (jeremyfoshee)]

Hi Raphael,

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 from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 392055

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. 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.]

[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.]