I had this problem in Karmic x86, when upgrading to generic kernel 2.6.31-20.
Apparently kernel 2.6.31-19 was still bootable. Just booting that and running sudo grub-install --recheck /dev/sda fixed it. -- Grub error 13: Invalid or unsupported executable format https://bugs.launchpad.net/bugs/365331 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
