Bug 700994

Summary: "Dim screen to save power" has no effect
Product: [Fedora] Fedora Reporter: Philipp Dörfler <phdoerfler>
Component: gnome-power-managerAssignee: Richard Hughes <richard>
Status: CLOSED WORKSFORME QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: collura, gordon.messmer, rhughes, richard
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Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2011-11-15 08:36:42 EST Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Philipp Dörfler 2011-04-30 06:18:02 EDT
Description of problem:
Setting "Dim screen to save power" in gnome-power-manager has no effect

Version-Release number of selected component (if applicable):

How reproducible:
Always reproducible.

Steps to Reproduce:
- Open gnome's system settings in gnome3
- click on "screen"
- check "Dim screen to save power"
- unplug the power cord so the laptop runs on battery
Actual results:
The screen's brightness remains unchanged.

Expected results:
The screen should dim to save power.

Additional info:
Opening dconf-editor and manually toggling org.gnome.power-manager.backlight-battery-reduce works as expected. It seems that gnome-power-manager should toggle this setting in dconf, but doesn't.
Comment 1 Richard Hughes 2011-11-15 08:36:42 EST
This should be fixed in F16, please reopen if that's not the case. Thanks.
Comment 2 Gordon Messmer 2012-03-05 12:10:42 EST
Since this is one of the top google hits for "gnome dim screen to save power", I wanted to update this entry.

The "Dim screen to save power" option currently sets the dconf value /org/gnome/settings-daemon/plugins/power/idle-dim-battery.  As far as I can tell, there is no setting anywhere in GNOME 3 (in Fedora 16) that will dim the screen when a PC switches from external to battery power.