Comment 17 for bug 680444

This has started for me too recently on Unbunt 10.10 - dbus-daemon using currently 44% CPU, and system monitor using 46%. It is July 26th 2011 and it appears to have started in the last week. Hmmm, the only thing different is that I've been booting with a music CD in tray.

Yep, taking the CD out of tray solved it! Putting the CD back in the tray did not spike CPU usage - but it happens when booting with a CD present.