I've had this issue before with the 2.4 kernel. I fixed it on my 2.6 kernel by adding the following to the end of the to the grub menu.lst kernel line:
acpi=force apm=off -- Gutsy shutdown doesn't https://bugs.launchpad.net/bugs/119308 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
