Arch Linux

nordmoen

Member

Registered: 2010-09-25

Posts: 37

KDE 4.6 more power hungry?

Hello there.
Just upgraded to the latest KDE release, which worked greate, only thing I noticed is that through Powertop KDE 4.6 seems more power hungry. It seems to draw around 3~4 watts more, does anyone else notice something along the same line?

locke87

Member

Registered: 2010-03-29

Posts: 41

Re: KDE 4.6 more power hungry?

I can't say anything about the power supply, but it needs a bit less memory and feels faster than 4.5.5

occam

Member

From: Melbourne, Australia

Registered: 2005-01-16

Posts: 82

Re: KDE 4.6 more power hungry?

I see in 'System Activity' that dbus-daemon uses 32% and nepomukserver 22% of the total CPU capacity when running KDE 4.6
In KDE4.5.* those percentages were less than 2%.  Maybe this has a bearing on your observation?

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Moduli non sunt multiplicandi praeter necessitatem

locke87

Member

Registered: 2010-03-29

Posts: 41

Re: KDE 4.6 more power hungry?

Well, I had this as well. I removed all files from Nepomuk and akonadi (After stopping both), that solved the issue.

nordmoen

Member

Registered: 2010-09-25

Posts: 37

Re: KDE 4.6 more power hungry?

I see in 'System Activity' that dbus-daemon uses 32% and nepomukserver 22% of the total CPU capacity when running KDE 4.6
In KDE4.5.* those percentages were less than 2%.  Maybe this has a bearing on your observation?

Thats the strange part, my system is behaving like with 4.5, nothing is using excessive amounts of CPU or Mem.

Well, I had this as well. I removed all files from Nepomuk and akonadi (After stopping both), that solved the issue.

Could you post how you did that? I have turned off Nepomuk, don't know about akonadi.

Mogger

Member

From: Sweden

Registered: 2008-12-07

Posts: 153

Website

Re: KDE 4.6 more power hungry?

Have you tried running powertop (I guess that's where you got the watts estimate)? What processes cause the most wakeups?

nordmoen

Member

Registered: 2010-09-25

Posts: 37

Re: KDE 4.6 more power hungry?

Have you tried running powertop (I guess that's where you got the watts estimate)? What processes cause the most wakeups?

It is usualy the same processes as on KDE 4.5
ath9k, Kernel scheduler, kworker, knotify4, firefox sometimes

Edit:
It seems that I was a little quick posting this, there is two things creating wakeups that I can't remember from 4.5, one of them is knotify4 which creates most and 19.8% ( 60.0)   [i915@pci:0000:00:02.0] <interrupt> which seems to be a bug in the intel driver.

Last edited by nordmoen (2011-01-28 12:51:38)