I found switching to the official xen 2.6.18 kernel stopped the problem from occurring. As mine is purely a server I could get by without the other niceties of the ubuntu kernels
-- Kernel BUG at drivers/xen/core/evtchn.c:481 https://bugs.launchpad.net/bugs/148543 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs