Summary: | Brightness get crazy (Bightness Up-down-Up-down) ...making system unusable | ||
---|---|---|---|
Product: | [Unmaintained] solid | Reporter: | maxime.haselbauer |
Component: | powermanagement-daemon | Assignee: | Dario Freddi <drf> |
Status: | RESOLVED FIXED | ||
Severity: | major | CC: | afiestas, andreazuben, auxsvr, fschaefer.oss, germano.massullo, kde, ksolsim, orion, peer.frank, rdieter |
Priority: | NOR | ||
Version: | 4.8.2 | ||
Target Milestone: | --- | ||
Platform: | Ubuntu | ||
OS: | Linux | ||
Latest Commit: | Version Fixed In: | 4.10 | |
Sentry Crash Report: |
Description
maxime.haselbauer
2011-12-12 22:57:56 UTC
I can confirm this bug, exactly the same happens with my Samsung NF310 netbook. dmesg shows lots of ACPI: Failed to switch the brightness messages. I can stop the flickering by setting a value manually via console. Doesn't happen with GNOME. KDE-version is 4.7.2, openSUSE 12.1. same flickering with FN-brighter (or via battery monitor slider), no reaction with FN-darker on a Samsung Chronos 7 notebook I confirm flickering with FN-"brighter" (or via battery monitor slider), no reaction with FN-"darker" on a Samsung Chronos 7 notebook Linux 3.1.10-1.9-desktop x86_64 KDE: 4.8.2 (4.8.2) "release 494" no hint on message.log I updated to OpenSuse 12.2 (linux 3.4.6): problem solved, screen brightness can be adjusted as expected with FN keys or slider in the power widget ! (kde 4.9.1 Samsung Chronos 7 notebook) This is *not* solved! It just occurred here on openSUSE 12.1, KDE 4.9.4. I suspect there is some race between kded services that set the brightness, because pressing the keys to adjust brightness is not always accompanied with display of the brightness level, and with previous versions of KDE attempting to adjust brightness by one step would result in adjusting it twice, once as expected and another time higher or lower at random! This is very annoying and I'm surprised it has persisted for so long. A possible workaround for the "strobe effect" is to kill kded. This bug appeared to me too, on arch and chakra with KDE 4.9.4 update. Bug is still present in both KDE 4.9.5 and KDE 4.10 RC2. Bug present in Arch, KDE 4.9.4 and 4.9.5.... and also 4.10 rc Similar here with 4.9.5 on Fedora 17, Dell Inspiron 1470 On KDE SC 4.10.0 bug is no longer present. This bug should be fixed in 4.10.0, can anybody reproduce it? Setting it as needs info I cant't confirm or infirm as I can not change the brightness due to a fancy new bug anyway...... For each bug solve two new bugs incoming... no problems on my Samsung Chronos 7 notebook since Sep2012. Meanwhile I'm running OpenSuse 12.3, Linux 3.7.10-1.1 and KDE 4.10.1 Works fine with Kubuntu 13.04 (KDE 4.10.2). |