Can you try booting with the following kernel boot option: nohz=off This disables the 'tickless' aspect of the tickless kernel (enabled by default in Gutsy & perhaps other releases). ksoftirqd appears to be getting bombarded by by requests (probably from not quite fully polished hardware drivers). This won't fix any issues with hardware drivers but may stop the CPU being bothered by so many errant requests.
** Changed in: linux-ubuntu-modules-2.6.24 (Ubuntu) Status: New => Incomplete -- zombie iwl4965 module after kill switch on with ksoftirqd 100% cpu usage https://bugs.launchpad.net/bugs/207400 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs