I have tested kernels 3.10 and 3.9.2 and didn't observe this bug. So it seems like it fixed. But both of this kernels works incorrect at my laptop - there are problems when loading nvidia module. I can't even works normally. Maybe it because of absence linux-image-extra package for both of this kernels. This means that environment for stable system and tested kernels was different. And I don't know if this matter on bug reproduce.
** Tags added: kernel-unable-to-test-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181085 Title: Sometimes system works too slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs