After a fresh install of Ubuntu 12.04, I'm also having this issue. (The side effects are nearly identical to a bug I reported here: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/924684, however the cause may be different.)
This occurred when I was trying to install virtualbox through the software center. There was an error because libpython2.7 could not be downloaded. When I closed the software center, the system hung up. Also running were: Chrome and Rhythmbox, and Pidgin in the background. After the system hung up, the audio from Rhytmbox skipped then stopped. Changing to another tty and issuing top revealed that pulseaudio was taking up ~50% CPU with other processes and 12 kworker processes taking up the rest. I killed Rhythmbox, pulseaudio and Chrome, but anytime I'd kill one of these processes, some other process would begin taking up a large amount of CPU with two or three kworkers always in the top 10 most-CPU- intensive processes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/717919 Title: ACPI + kworker high interrupts. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/717919/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
