Bug 191466

Summary: knotify4 causes enormous amount of wake-ups
Product: [Unmaintained] kdelibs Reporter: Casper van Donderen <casper.vandonderen>
Component: knotifyAssignee: Olivier Goffart <ogoffart>
Status: RESOLVED DUPLICATE    
Severity: normal CC: andresbajotierra
Priority: NOR    
Version: 4.2   
Target Milestone: ---   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Casper van Donderen 2009-05-03 14:08:45 UTC 
Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    SuSE RPMs

On my ThinkPad X61 Tablet notebook knotify4 causes me to lose around 15 minutes of battery life (from 2.8 to 2.5 hours). If I kill knotify4 (which autostarts again) the monitor in powertop suddenly gives me 0.3 hours more battery life.

Powertop output:
Top causes for wakeups:
  45.3% (901.8)          knotify4 : futex_wait (hrtimer_wakeup)
  20.8% (413.4)       <interrupt> : extra timer interrupt
  20.6% (409.3)       <interrupt> : uhci_hcd:usb3, yenta, i915@pci:0000:00:02.0

for ordinary users this might not be that much of a problem, but I need to be able to use my laptop for 2 hours 15 minutes on battery (train travel). I don't know if this is solvable in any way....

regards, Casper
Comment 1 Dario Andres 2009-05-03 14:22:52 UTC 
This may be related to bug 156215. Are you using the Xine Phonon engine ?
Thanks
Comment 2 Casper van Donderen 2009-05-03 14:34:17 UTC 
Confirmed, switching to Gstreamer fixes the problem. 

Should I mark it as duplicate?
Comment 3 Dario Andres 2009-05-03 14:37:03 UTC 
Ok, I'm marking as duplicate.
Thanks for doublechecking.

*** This bug has been marked as a duplicate of bug 156215 ***