Comment 0 for bug 280646

Binary package hint: gnome-power-manager

[regression from 8.04]

I'm not sure about the root cause of this yet, but starting here.

Pressing the brightness up/down keys on my ThinkPad T61 no longer changes the brightness of the LCD backlight. This worked fine in 8.04, and at some point in Intrepid as well.

When I press the brightness-up key, I see two ACPI events:
video LCD0 00000086 00000000
ibm/hotkey HKEY 00000080 0000501

brightness-down is similar:
video LCD0 00000087 00000000
ibm/hotkey HKEY 00000080 0000501

In xev, I see KeyPress and KeyRelease events forXF86MonBrightnessUp and XF86MonBrightnessDown, respectively.

However, the backlight is not actually changed, and gnome-power-manager does not display the brightness level OSD (both of which worked in 8.04)

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 8.10
Package: linux-image-2.6.27-5-generic 2.6.27-5.8 [modified: lib/modules/2.6.27-5-generic/modules.pcimap lib/modules/2.6.27-5-generic/modules.dep lib/modules/2.6.27-5-generic/modules.ieee1394map lib/modules/2.6.27-5-generic/modules.usbmap lib/modules/2.6.27-5-generic/modules.isapnpmap lib/modules/2.6.27-5-generic/modules.inputmap lib/modules/2.6.27-5-generic/modules.seriomap lib/modules/2.6.27-5-generic/modules.alias lib/modules/2.6.27-5-generic/modules.symbols]
ProcCmdLine: root=UUID=305dde78-d20a-4248-aaf4-09447b7c5791 ro quiet splash
ProcEnviron:
 LC_COLLATE=C
 PATH=/home/username/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/sbin:/usr/sbin:/usr/games:/usr/lib/surfraw
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.27-5.8-generic
SourcePackage: linux