Public bug reported:
Binary package hint: gnome-power-manager
I can adjust the brightness of the screen with the brightness applet or
with the Fn-Home (increase brightness) and Fn-End (decrease brightness)
keyboard shortcuts. When I press Fn-End, the screen dims, the
"brightness meter" appears on the screen and the slider in the brighness
applet is changed accordingly. However, if I use the Fn-Home key
combination, the brightness increases, but the "brightness meter" does
not appear and the slider in the brightness applet is not updated.
Usually when the slider in the brightness applet is adjusted the screen
brightness "catches up" with it but on a couple occasions the slider
stops working and the following message appears in /var/log/syslog:
May 27 17:11:40 csb-laptop kernel: [ 155.937282] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
May 27 17:11:40 csb-laptop kernel: [ 155.967048] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
May 27 17:11:40 csb-laptop kernel: [ 156.009140] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
May 27 17:11:40 csb-laptop kernel: [ 156.038740] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
May 27 17:11:40 csb-laptop kernel: [ 156.098716] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
May 27 17:11:40 csb-laptop kernel: [ 156.128828] thinkpad_acpi: CMOS NVRAM (4)
and EC (5) do not agree on display brightness level
The numbers in the parentheses varies. I'm not able to reproduce this
particular behaviour consistently.
Steps to reproduce:
1. Decrease the screen brightness with the slider in the brightness applet.
2. Increase the screen brightness with the Fn-Home key combination
Expected result:
The screen brightness increases, the brightness indicator is displayed
on-screen, and the slider in the brightness applet is updated
Actual result:
The screen brightness increases, but the brightness indicator is not displayed
and the slider is not updated
ProblemType: Bug
Architecture: i386
Date: Tue May 27 17:19:25 2008
DistroRelease: Ubuntu 8.04
NonfreeKernelModules: fglrx ath_hal
Package: gnome-power-manager 2.22.1-1ubuntu4
PackageArchitecture: i386
ProcEnviron:
SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
LANG=en_CA.UTF-8
SourcePackage: gnome-power-manager
Uname: Linux 2.6.24-17-generic i686
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug
--
Brightness applet loses sync with screen brightness
https://bugs.launchpad.net/bugs/235363
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