Confirmed that nVidia driver seems to be unrelated. I tested with the nouveau driver with the same results. It is either something in the 2.6.35 branch, or some Ubuntu patch added to the kernel. I experienced no issues for over a month using 2.6.36 from mainline repo.
** Summary changed: - Intel Core i7, nVidia proprietary - Timer interrupt freezes, system becomes sluggish + Intel Core i7 - Timer interrupt freezes, high CPU usage, system becomes sluggish -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/665796 Title: Intel Core i7 - Timer interrupt freezes, high CPU usage, system becomes sluggish -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs