View Full Version : [kubuntu] KDE 60% cpu with just file manager open
Ascenti0n
September 2nd, 2009, 01:20 PM
This post is just to share my 'concerned' experience.
I have been using KDE as my default session on Ubuntu 9.04, for about 3 weeks now.
Today I noticed that without any apps open and running, CPU usage runs at 20%. I noticed that with just Dolphin opened, that rate climbs to 80%, no other apps were running (foreground).
I tried different apps, one at a time and got the same results. Every time I open up just one app, the CPU usage climbs to 80% and stays there until that one app is closed.
I observed this with:
Dolphin, Konqueror (shares same libs), opening a terminal and running midnight commander, Kate.
I'm posting this as it may be of interest to somebody.
jacksaff
September 2nd, 2009, 01:25 PM
Do you have strigi (file indexing for desktop search) running?
I got strigi running a week ago and found that it made dolphin extremely slow, even when it was not actively indexing.
Ascenti0n
September 2nd, 2009, 01:33 PM
Do you have strigi (file indexing for desktop search) running?
I got strigi running a week ago and found that it made dolphin extremely slow, even when it was not actively indexing.
I havent used or started ANY desktop search index, at least not intentionally.
TBH, this is the first day I noticed such high CPU usage.
I even observed this over a ten minute period as I know when the system is working on any updates to download that takes up a lot of CPU, but that wasn't the case here.
krazyd
September 2nd, 2009, 02:02 PM
are you running nvidia proprietary driver?
run 'top' in a terminal. what's at the top?
Ascenti0n
September 2nd, 2009, 02:28 PM
I had to log back into KDE as I got fed up and logged into good'ol boring Gnome.
I ran 'top' which I had been running prior to logging out of KDE, and as I noted then, 'Kwin' is at the top.
2 points of note:
1. logging back into KDE, and with various apps open including Firefox 3.x and Dolphin, CPU usage rates are back to under 20%
2. When I logged into Gnome and started the system monitor, I noticed all was nice and low, with the same apps open as above.
krazyd
September 2nd, 2009, 03:27 PM
and are you using the nvidia driver?
Ascenti0n
September 2nd, 2009, 03:43 PM
YES, and I have the latest (Nvidia) driver installed (180.44)
krazyd
September 2nd, 2009, 04:18 PM
That's your problem. The nvidia drivers are known to be buggy, and unfortunately kwin uses some acceleration features which trigger those bugs. You could try upgrading to a newer nvidia driver from their website. Also ask around on nvnews.net forums - I've seen a few people with similar issues. Unfortunately, because the drivers are proprietary there's not much anyone except nvidia can do.
See here:
https://bugs.launchpad.net/ubuntu/+source/kdebase-kde4/+bug/253279
http://linux.derkeiler.com/Mailing-Lists/Fedora/2008-07/msg01752.html
Ascenti0n
September 2nd, 2009, 04:26 PM
Thanks Krazyd for your time and insight.
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