[lucid] brightness keeps getting decreased while non-idle

Bug #292840 reported by steltenpower on 2008-11-02
28
This bug affects 6 people
Affects Status Importance Assigned to Milestone
gnome-power-manager (Ubuntu)
Low
Unassigned

Bug Description

I just increased brightness to maximum and then a few seconds later (while heavily typing on my machine) ubuntu lowers it again.

I'm on a Ahtec Sense XMS 1719

Dimitrios Symeonidis (azimout) wrote :

could it be your power management settings?

Marc Carter (drekbour) wrote :

This affects me too (8.10, thinkpad x60) and has been a pain for a long time now (certainly was present in Hardy, can't remember back to Gutsy). Experimentation shows two distinct problems.

a) "on battery power" -> "reduce backlight brightness" When selected this sets the normal brightness to 50% but doesn't actually stop the user from pumping it back to 100%. Occasionally I presume the power management daemon notices (to force this close and reopen the power console) and sets it back in a most frustrating way. If (and I think we should) we allow users to boost the brightness above the cap then this reset should be done during a video power event (screen off, idle etc) and not simply enforced every time something is randomly polled.

ref #136693 for related fixes done in the area of auto/manual brightness that may not have been fully thought through.

b) "idle detection" clearly isn't working (as described by the OP). Right now (on AC and clearly not idle) I can choose "dim display when idle" and it _immediately_ sets the display to 25%. Again, I can boost the brightness but it will "notice" and reset it.

Victor Vargas (kamus) wrote :

Since this report have a long time without activity, could you check (if is possible) in latest version included in Karmic if this issue is still happening? Thanks in advance.

Marc Carter (drekbour) wrote :

same hardware on Karmic. Issue (a) still evident although this is a trivial item. issue (b) seems to have been fixed.

I can confirm this. Setting brightness to a set level, with the "reduce backlight when idle" setting on, reduces the backlight, but when the mouse is moved again, does not return to the manually set light level.

Changed in gnome-power-manager (Ubuntu):
importance: Undecided → Low
status: Incomplete → Confirmed
tags: added: apport-collected

Architecture: i386
CheckboxSubmission: 49c3c74c783323aedd48e2bbf8c468de
CheckboxSystem: 2e4ab5fb96eeb897d439b8ef1239668e
DistroRelease: Ubuntu 10.04
NonfreeKernelModules: nvidia
Package: gnome-power-manager 2.28.1-0ubuntu3
PackageArchitecture: i386
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-10.14-generic
Tags: lucid
Uname: Linux 2.6.32-10-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

apport information

apport information

apport information

apport information

summary: - brightness keeps getting decreased while non-idle
+ [lucid] brightness keeps getting decreased while non-idle
tags: added: intrepid karmic lucid
Changed in gnome-power-manager (Ubuntu):
status: Confirmed → Triaged

Marking Triaged.
Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Ubuntu better!

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