GNOME Bugzilla – Bug 483143
Brightness not restored to previous value on leaving idle...
Last modified: 2009-03-04 14:43:44 UTC
In gnome-power-manager 2.20, the system brightness is not restored to its previous value on leaving the idle state. This seems like a logical thing to do - otherwise, we end up with the screen possibly becoming brighter (or worse, actually becoming more *dim*) once the system exits the idle state. This issue has been confirmed on the latest release of gnome-power-manager as shipped with Ubuntu "Gutsy".
Link to the relevant Ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/137598
Created attachment 108208 [details] My GPM info from the .sh script I'm not entirely sure that the description covers my bug. My computer (unpredictably and not very related to time) dims the backlight occasionally. When I then move the mouse etc, the brightness doesn't change at all. That leaves it as permanently dimmed unless I use the hotkeys to raise it again.
Hello, 1) I hate all these brightness related bugs, especially since they represent a regression. 2) There are several bugs that overlap(#478128, #483134, #483143, #509211) ; IMHO, there should be ONLY ONE I have reported this in Debian bug #467264 and I explained why the current (and former) behaviour is(was) wrong and how they should actually behave. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=467264 To summarize: - AC and battery settings MUST not interact with each other - the battery *brightness*slider* should be *brought*back* (one should be able to set the default battery brightness level, no matter what automatic dimming effect is added) - dimming on idle should *really*dim*or*do*nothing*, if dimming is not possible; is should NEVER bright up the display - using the *brightness* *keys* should be a clear adjustment of the default brightness level and it should *always* have precedence over anything automatically computed or commanded - DO NOT DIM WHILE ACTIVE If anyone cares, here is the summary I made in the debian bug report: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=467264#33
Sorry, the entire list of bug was: bug #478128, bug #483134, bug #483143, bug #509211, bug #530346, bug #335673 and bug #483144
I confirm this bug in Gnome 2.22.3. The brightness is dimmed on idle, but after activity the previous brightness value is not restored (instead some other value is set, in my case much brighter value). This is extremely annoying.
I'm using Gnome 2.24.1 and still have this brightness issue. Even when activating a virtualbox session screen brightness falls to zero. That happens with OpenCity as well. My laptop does not have a physical brightness slider such as those on older IBM laptops. I don't know if it's a bug with xbacklight as well as gnome-power-manager but when I manually set brightness to 100 after auto-dimming it does not work but setting it to 99 then to 100 works.
This problem has been fixed in the development version. The fix will be available in the next major software release. Thank you for your bug report.