I had this problem while running maverick on a 3.5 kernel. Then having the following in my /etc/rc.local fixed it echo N > /sys/module/drm_kms_helper/parameters/poll
now upgraded to raring and the problem is back, this time a echo disable > /sys/firmware/acpi/interrupts/gpe11 as suggested on http://carlocapocasa.com/crushing-the-kworker-uprising-or-how-to-fix-your-linux-lenovo-ideapad-y560p/ seems to work. I'm running ubuntu 13.04 with kernel 3.8.0-22-generic (64bit) on a thinkpad x200s (intel videocard). it mainly appears on boot or when starting processes which take up a lot like firefox, even when those processes are idle. the mouse-pointer becomes sluggish/frozen and 1-5 kworker processes seem to hog the cpu, but when looking at their stack all you see is something like: [<ffffffff810780a7>] worker_thread+0x237/0x480 [<ffffffff8107d370>] kthread+0xc0/0xd0 [<ffffffff816d39ec>] ret_from_fork+0x7c/0xb0 [<ffffffffffffffff>] 0xffffffffffffffff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/887793 Title: Kworker constantly taking about 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/887793/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
