Bug 668036

Summary: ThinkPad W510 nVidia Corporation GT216 [Quadro FX 880M] *extremely* dim display when running under battery
Product: [Fedora] Fedora Reporter: Joel <hundred17>
Component: gnome-power-managerAssignee: Richard Hughes <richard>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 14CC: christopherheiny, codezilla, liko, rhughes, richard
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-08-16 16:03:38 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Joel 2011-01-07 13:04:06 EST
Description of problem:
With the default power management settings, the "Reduce backlight brightness" option is enabled while running on battery.  With this enabled, if I unplug my ThinkPad W510 with nVidia Corporation GT216 [Quadro FX 880M] video (using nouveau driver) the screen dims to an unbelievably low level.  Setting screen brightness to the max makes essentially no difference.

Plugging the laptop back into AC power will bring the screen back to the original full brightness for a fraction of a second before going back to the super dim setting.  Unplugging from AC also switches the screen to full brightness for a fraction of a second before returning to super dim mode.  The only way to return to normal brightness wile on AC power (w/o messing with the power settings in gnome-power-manager) is to reboot.  Even the non-X text consoles are dim.

The only workaround I've found is to disable the "Reduce backlight brightness" option through gnome-power-manager.

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

How reproducible:
Every single time.

Steps to Reproduce:
1.Boot Fedora 14 on ThinkPad W510 with nVidia Corporation GT216 [Quadro FX 880M] under AC power
2.Log into X and unplug AC...witness screen brightness become unusably low.
3.Plug AC back in...witness screen brightness stay unusably low.
Actual results:
Unusably low screen brightness

Expected results:
Usable screen brightness

Additional info:
Comment 1 Taunus 2011-03-25 04:31:49 EDT
I am also having the same problem on same HW.
Comment 2 Christopher Heiny 2011-04-06 01:51:33 EDT
I am also experiencing this issue.  A severity of "moderate" is definitely understating the stiuation - my W510 is unusable except in the dimmest of lighting, which seriously impairs its usefulness around the office.
Comment 3 Richard Hughes 2011-11-15 07:51:46 EST
Does this still happen in F15 or F16? Thanks.
Comment 4 Joel 2011-11-15 08:34:46 EST
I no longer have this hardware.  My Intel-based thinkpad T410 its just fine.
Comment 5 Christopher Heiny 2011-11-15 09:54:47 EST
I still have the W510 hardware, and will be updating to F16 later this month.  I'll let you know what results.
Comment 6 Fedora End Of Life 2012-08-16 16:03:41 EDT
This message is a notice that Fedora 14 is now at end of life. Fedora 
has stopped maintaining and issuing updates for Fedora 14. It is 
Fedora's policy to close all bug reports from releases that are no 
longer maintained.  At this time, all open bugs with a Fedora 'version'
of '14' have been closed as WONTFIX.

(Please note: Our normal process is to give advanced warning of this 
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