Bug 486027

Summary:	Display is always dimmed to 7 on power event
Product:	Red Hat Enterprise Linux 5	Reporter:	Michael Solberg <msolberg>
Component:	hal	Assignee:	David Zeuthen <davidz>
Status:	CLOSED DUPLICATE	QA Contact:	desktop-bugs <desktop-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.3	CC:	mclasen, rhughes, sghosh
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-03-11 16:57:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Michael Solberg 2009-02-17 22:22:18 UTC

Description of problem:

Every time there's a "power event" like the power chord being unplugged or plugged, my Lenovo T61's display is dimmed to half it's brightness, even though I've set both "ac_brightness" and "battery_brightness" to 100.

Version-Release number of selected component (if applicable):
gnome-power-manager-2.16.0-10.el5
kernel-2.6.18-128.1.1.el5

How reproducible:
100%

Steps to Reproduce:
1. Ensure that the following gconf keys are set to 100:
  * /apps/gnome-power-manager/ac_brightness
  * /apps/gnome-power-manager/battery_brightness
2. Either unplug or re-plug the AC.
3. Check brightness in /proc/acpi/ibm/brightness
  
Actual results:
  * Screen is dim
  * /proc/acpi/ibm/brightness shows a Level of 7

Expected results:
  * Screen is bright
  * /proc/acpi/ibm/brightness shows a Level of 15


Additional info:
  Screen also dims when screensaver activates

Comment 1 Michael Solberg 2009-02-17 22:35:12 UTC

Updating platform

Comment 2 Michael Solberg 2009-02-19 15:54:30 UTC

Turns out this is actually a problem in HAL.

The property laptop_panel.num_levels is set to 7 on my panel.  If I do this:

hal-set-property --udi /org/freedesktop/Hal/devices/acpi_brightness --key laptop_panel.num_levels --int 15

Then gnome-power-manager behaves as expected.

Michael.

Comment 3 Richard Hughes 2009-03-11 16:57:09 UTC


*** This bug has been marked as a duplicate of bug 475850 ***