Public bug reported:
Binary package hint: gnome-power-manager
Maverick only supplies 4 brightness increments on my PC, although I have
8 possible increments - my LCD supports the following levels:
$ cat /proc/acpi/video/VID/LCD/brightness
levels: 12 24 36 48 60 72 84 100
current: 72
For instance, when the screen is set to maximum (100), pressing the
brightness down keys (FN-down arrow) makes the brightness go to 72, then
48, then 24, then 12. Pressing up from here makes the brightness go to
36, then 60, then 84, then 100.
I'm currently running a 2.6.36-rc3 kernel, but the problem also exists
in the stock Maverick 2.6.35 kernel.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: gnome-power-manager 2.31.91-0ubuntu1
Uname: Linux 2.6.36-rc3-perf-oss x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Sep 11 15:25:57 2010
GConfNonDefault:
/apps/gnome-power-manager/lock/blank_screen=false
/apps/gnome-power-manager/lock/use_screensaver_settings=false
/apps/gnome-power-manager/notify/sleep_failed_uri=
/apps/gnome-power-manager/ui/icon_policy=charge
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
MachineType: Dell Inc. XPS M1530
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.36-rc3-perf-oss
root=UUID=a66dc9a6-af1e-4526-b2d7-c40dffd8c79f ro quiet splash
ProcEnviron:
LANG=en_AU.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-power-manager
dmi.bios.date: 11/19/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA12:bd11/19/2008:svnDellInc.:pnXPSM1530:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1530
dmi.sys.vendor: Dell Inc.
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug maverick
--
screen brightness adjustment misses levels
https://bugs.launchpad.net/bugs/635574
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