Bug 191466

Summary:	knotify4 causes enormous amount of wake-ups
Product:	[Frameworks and Libraries] kdelibs	Reporter:	Casper van Donderen <casper.vandonderen>
Component:	knotify	Assignee:	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:

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 ***