[KDE] KWin using 100% CPU

[jchonig]

I just upgraded my desktop to 14.04 (OK, reinstalled 14.04 to replace 12.04).

I find that KWin is using 100% of one of my (eight) CPUs.

I'm using multi-head, Activities, Virtual Desktops and an nVida card with the 331 drivers.

Any suggestions on how to debug this?

I've also noticed some kwin crashes, but they only seem to happen while configuring Special Window Settings.

Thanks.

Jeff

[richb]

Most likely it is Baloo and indexing your files. Does it settle down after a period of time?

There is another thread on this here. Do a search on Baloo.

[jchonig]

Most likely it is Baloo and indexing your files. Does it settle down after a period of time?

There is another thread on this here. Do a search on Baloo.

The process chewing the cpu is /usr/bin/kwin, not /usr/bin/baloo-file.
It has been running at 100% CPU for two days now, so I doubt that is the issue.

[jchonig]

Hmm, when I came down to my office and unlocked the desktop and the kwin process was no longer chewing CPU. Maybe it's a bad interaction with lightdm. Does lightdm run by default on a kubuntu installation?

I installed xubuntu images, then unity, then gnome, and finally kubuntu trying to find one that worked acceptably in multi-head mode as things seem broken since 12.04.

[SteveRiley]

I installed xubuntu images, then unity, then gnome, and finally kubuntu trying to find one that worked acceptably in multi-head mode as things seem broken since 12.04.

With all that, it can be very difficult to predict how the machine may behave. I run two (sometimes three) monitors using nVidia binary driver in my ThinkPad T520. I've been on 337 and am right now upgrading to 340 as I type this. I use the Xorg-Edgers PPA. Multiple monitors work fine here.