same here: - Samsung Series 7 NP700Z7C - Ubuntu 12.10 fresh install symptoms: ACPI will do around 14k/s - 16,5k/s interrupts with battery, around 17k/s - 33k/s with power supply. kworker will do around 80% cpu usage on one core, fan will run all the time, battery runtime around 3h. power stats and brightness controls work as expected.
pci=noacpi will remove the problem at the cost of somewhat non-working battery-detection and brightness control. it detects power-loss and reduces brightness to a very dim screen but will never recover even if power is restored. brightness controls are non-working then, battery runtime reporting around 6h. im not using nvidia drivers nor bumblebee as i dont care for gfx- performance, just nouvou. -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
