Description of problem:
Powertop output on my laptop shows these processes at the top:
Top causes for wakeups:
40.7% (100.0) knotify4 : __mod_timer (process_timeout)
27.4% ( 67.4) <kernel IPI> : Rescheduling interrupts
14.3% ( 35.1) <interrupt> : ahci, uhci_hcd:usb6, i915@pci:0000:00:02.0
5.3% ( 13.1) firefox : futex_wait (hrtimer_wakeup)
2.2% ( 5.5) artsd : __mod_timer (process_timeout)
knotify4 is much higher than even firefox!
Known issue with kde-4.1, it's most likely phonon-backend-xine, which is addressed in kde-4.2 (coming soon).
Quite likely, I don't see this with phonon-gstreamer which I'm using
See also kde bug, http://bugs.kde.org/156215
Fixed in upstream, will be in KDE 4.2
Reopening to track KDE 4.2 push (reference added to the KDE 4.2 update, so Bodhi should autoclose it).