Same symptoms, same solution. For me the top processes were event, kondemand, xfslogd and xfsdatad -- maybe it helps someone searching for this. Thanks to Stefan for the solution, I wouldn't have thought of this.
I'm also running Ubuntu 10.10 on a ThinkPad T61, and my ethernet port light is on. Thinking of it, the problem has probably been caused by booting into Ubuntu, rebooting to Windows XP, then rebooting to Ubuntu (without powering off). When I reboot from Ubuntu to Windows XP, the ethernet port is unusuable and can only be revived by powering off the ThinkPad and shortly disconnecting the power source (because Ubuntu powers off the network adapter when shutting down, and the Windows driver is incapable of controlling the network adapter power, at least that's what I read somewhere). Seems there is a related problem when rebooting from Windows XP to Ubuntu. If anything, I guess this is a bug in the network driver (e1000e). I'm happy to provide further information / testing in case anybody cares! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/738753 Title: Anormal CPU activity (kondemand) since today Maverick update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/738753/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs