Same problem here, only with 2.6.20-6-generic kernel and VirtualBox. I also have a crash using qemu+kqemu, but not with qemu without kernel module. 2.6.20-5-generic does not have this issue.
-- [Feisty] Kernel doesn't boot on Virtualbox (paging request) https://launchpad.net/bugs/84191 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs