Bug 638355 - Laptop display "blinks" when changing brightness rapidly
Laptop display "blinks" when changing brightness rapidly
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
low Severity low
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Assigned To: Matthew Garrett
Fedora Extras Quality Assurance
: Triaged
Depends On:
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Reported: 2010-09-28 16:09 EDT by Marti Raudsepp
Modified: 2012-08-16 15:29 EDT (History)
10 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-08-16 15:29:20 EDT
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Description Marti Raudsepp 2010-09-28 16:09:34 EDT
Description of problem:
I'm using the Fedora 14 graphics test day live image (2010-09-28). I have an Nvidia G86M [Quadro NVS 135M] graphics card in my Dell Latitude D630 laptop.

When I change display brightness rapidly using the keyboard shortcuts Fn+DownArrow or Fn+UpArrow, the screen momentarily "blinks" back to previous brightness levels. This looks quite annoying when intending to change brightness quickly.

Another way of explaining this, When I press the "brightness down" keystroke 3 times in rapid succession, then brightness goes by a level on each keystroke, so 3 levels down total. But after a short instant, it reverts to the 2nd level.

The translucid on-screen brightness overlay only goes down by 2 levels, however, as if it never notices the 3rd keystroke.

Version-Release number of selected component (if applicable):
Name        : xorg-x11-drv-nouveau
Version     : 0.0.16
Release     : 12.20100920gitf1ac413.fc14

How reproducible:
Happens always

Additional info:
Smolt hardware profile:
Comment 1 Adam Williamson 2010-10-08 11:52:15 EDT
Man, Matthew's sure going to love me.
Comment 2 Fedora End Of Life 2012-08-16 15:29:23 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Fedora's policy to close all bug reports from releases that are no 
longer maintained.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 
occurring, but we forgot to do that. A thousand apologies.)

Package Maintainer: If you wish for this bug to remain open because you
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