I have the same problem on a Dell Latitude D630. Brightness seems to be set through hardware (stopping acpid has no effect, and stopping hal just prevents the brightness bar from appearing on the screen when I press the brightness keys).
Brightness reset is triggered by gnome-screensaver. Messages printed by gnome-screensaver --no-daemon --debug when the brightness reset happens: [power_timer] gs-watcher-x11.c:1080 (00:37:00): in power timer [power_timer] gs-watcher-x11.c:1098 (00:37:00): Setting power notice elapsed: 30003 [watcher_power_notice_cb] gs-monitor.c:139 (00:37:00): Power notice signal detected: 1 [_gs_watcher_set_session_power_notice] gs-watcher-x11.c:478 (00:37:00): Changing power notice state: 1 I'm currently using "killall gnome-screensaver" as a workaround, but the bug seems to be that g-p-m doesn't pick up any brightness changes made via the keyboard unless I manually click on the brightness applet icon. If I do that, the gconf value of /apps/gnome-power-manager/backlight/brightness_ac is updated, and the brightness is not reset later. This kind of problem has already been reported multiple times to upstream, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=467264#38. BTW, I'd really like to have a checkbox labeled "Don't EVER automatically change display brightness" in the g-p-m prefs dialog until all that g-p-m brightness mess has been cleaned up. It would save me from choosing between dysfunctional brightness keys and a dysfunctional gnome-screensaver. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
