KDE 4.9.4 refreshes screen brightness rapidly

Bug #1088150 reported by blubman on 2012-12-09
This bug affects 3 people
Affects Status Importance Assigned to Milestone
kde-workspace (Ubuntu)

Bug Description

After the chosen time for dimming the screen (in power management) the screen-brightness continues to change between 100% and the chosen value with a frequency way under 1/s.

Disabling the setting in the power manager does not help, restarting display manager does not help, rebooting helps from time to time.

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1088150/+editstatus and add the package name in the text box next to the word Package.

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tags: added: bot-comment
Fabio Marconi (fabiomarconi) wrote :

Assigned to kdebase for a better triage

affects: ubuntu → kdebase (Ubuntu)
Philip Muškovac (yofel) wrote :

This should be caused by commit 285553edce61f65a88d9067136bf138e44efb149 which will be reverted in the archive packages for 4.9.4.

affects: kdebase (Ubuntu) → kde-workspace (Ubuntu)
tags: added: kubuntu quantal
Changed in kde-workspace (Ubuntu):
importance: Undecided → Medium
status: New → Triaged
Changed in kde-workspace (Ubuntu):
importance: Medium → High
Changed in kde-workspace (Ubuntu Quantal):
status: New → Triaged
importance: Undecided → High

Hello blubman, or anyone else affected,

Accepted into quantal-proposed. The package will build now and be available in a few hours in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in kde-workspace (Ubuntu Quantal):
status: Triaged → Fix Committed
tags: added: verification-needed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package kde-workspace - 4:4.9.97-0ubuntu2

kde-workspace (4:4.9.97-0ubuntu2) raring; urgency=low

  * Add kubuntu_revert_285553e.diff to revert upstream commit
    285553edce61f65a88d9067136bf138e44efb149 as it causes brightness
    flickering on some systems (LP: #1088150)
 -- Philip Muskovac <email address hidden> Sun, 06 Jan 2013 01:01:01 +0100

Changed in kde-workspace (Ubuntu Raring):
status: Triaged → Fix Released
Antonis Kanouras (akanouras) wrote :


kde-workspace 4:4.9.4-0ubuntu0.2 from quantal-proposed indeed fixes this for my Fujitsu Amilo Pi 3560.


Scott Kitterman (kitterman) wrote :

Thanks for testinng.

tags: added: verification-done
removed: verification-needed
blubman (blubman42) wrote :

Hi, seems to work. THX

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

Launchpad Janitor (janitor) wrote :

This bug was fixed in the package kde-workspace - 4:4.9.4-0ubuntu0.2

kde-workspace (4:4.9.4-0ubuntu0.2) quantal; urgency=low

  * Add kubuntu_revert_285553e.diff to revert upstream commit
    285553edce61f65a88d9067136bf138e44efb149 as it causes brightness
    flickering on some systems (LP: #1088150)
 -- Philip Muskovac <email address hidden> Sat, 05 Jan 2013 17:36:32 +0100

Changed in kde-workspace (Ubuntu Quantal):
status: Fix Committed → Fix Released
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