Ubuntu
xfce4-power-manager package

Brightness "dims" to brighter value on inactivity

Bug #900592 reported by Steven Keys
22
This bug affects 3 people
Affects Status Importance Assigned to Milestone
Xfce4 Power Manager
Fix Released
Medium
xfce4-power-manager (Debian)
Fix Released
Unknown
xfce4-power-manager (Ubuntu)
Fix Released
Low
Lionel Le Folgoc

Bug Description

I'm running Xubuntu 11.10 64-bit, and I am referring to settings under Xfce Settings Manager > Power Manager > On Battery > Monitor. If I have "reduce screen brightness when computer is inactive" enabled, and I set the level to (for example) 20%, and then I am using my computer on (for example) 10% brightness, it will "dim" UP to 20% on inactivity, which obviously does not save power, which is the intended usage of the feature. I propose that whenever the current brightness value is below the "dimming" brightness setting, the screen should not change brightness upon inactivity, since it makes no sense to brighten up on inactivity.

Revision history for this message
In , Main-haarp (main-haarp) wrote :

Currently, that setting is absolute (e.g. dim to 20% when inactive for X minutes). However, if I am already running at 10%, it will *increase* brightness of the screen after X minutes of inactivity.

Either there should be a check against that, or the desired brightness should be handled relative to the current brightness (e.g. -20%)

Lionel Le Folgoc (mrpouit)
Changed in xfce4-power-manager (Ubuntu):
status: New → Triaged
importance: Undecided → Low
Bug Watch Updater (bug-watch-updater)
Changed in xfce4-power-manager (Debian):
status: Unknown → Confirmed
Revision history for this message
Chris Eineke (chris.eineke) wrote :

I can confirm this bug with a fresh install of Ubuntu 11.10.

If I unplug my laptop from the AC adapter, the display will dim from %100 to %80. After 20 seconds of no user input, the display will brighten up to %100, rinse and repeat.

Revision history for this message
Steven Keys (steevven1) wrote :

Chris, your experience does not sound like this bug at all. Additionally, Ubuntu does not use xfce4-power-manager by default. You should file a different bug.

Revision history for this message
Jorge_C (jorge.c) wrote :

There was a commit upstream[1] to fix this a few months ago. It's quite simple, so maybe we could pull it into Ubuntu. If so, how?

[1] http://git.xfce.org/xfce/xfce4-power-manager/commit/?id=ab07509cdf0fa05c56ae61a020abce2ac1fb28cb

Revision history for this message
In , Lionel Le Folgoc (mrpouit) wrote :

There's a check already, added by the following commit: http://git.xfce.org/xfce/xfce4-power-manager/commit/?id=ab07509cdf0fa05c56ae61a020abce2ac1fb28cb
(it's not part of any release yet, though)

Revision history for this message
Lionel Le Folgoc (mrpouit) wrote :

Indeed, the fix looks rather straightforward, I think I'll include it in the next upload for precise. Thanks.

Changed in xfce4-power-manager (Ubuntu):
assignee: nobody → Lionel Le Folgoc (mrpouit)
status: Triaged → In Progress
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package xfce4-power-manager - 1.0.10-5ubuntu2

---------------
xfce4-power-manager (1.0.10-5ubuntu2) precise; urgency=low

  * debian/patches:
   - 07_fix_broken_empty_icon_battery.patch: From upstream, fix empty icons in
     the systray (LP: #846878)
   - 08_show_preferences_lxde.patch: Hide settings menu only on desktop
     environment which have another power manager.
   - 09_fix_insert_battery.patch: Another patch to fix empty icon when
     removing a battery. Thanks Henry Gebhardt for the patch.
   - 10_dim_brightness.patch: From upstream, only dim brightness if the current
     level is brighter. (LP: #900592)
 -- Julien Lavergne <email address hidden> Sun, 18 Mar 2012 17:38:44 +0100

Changed in xfce4-power-manager (Ubuntu):
status: In Progress → Fix Released
Revision history for this message
In , Lionel Le Folgoc (mrpouit) wrote :

*** Bug 8572 has been marked as a duplicate of this bug. ***

Revision history for this message
In , Lionel Le Folgoc (mrpouit) wrote :

*** Bug 8329 has been marked as a duplicate of this bug. ***

Bug Watch Updater (bug-watch-updater)
Changed in xfce4-power-manager (Debian):
status: Confirmed → Fix Released
Revision history for this message
In , Simon Steinbeiß (ochosi) wrote :

It's fixed in git master and is probably even released in 1.2.0 (for sure in 1.3.0).

Bug Watch Updater (bug-watch-updater)
Changed in xfce4-power-manager:
importance: Unknown → Medium
status: Unknown → Fix Released
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