Another report on this: I'm using an Intel DG43NB motherboard (Intel G43 Express chipset, AMI EFI 2.00) with a Celeron E3300 CPU. I'd previously been booting in BIOS mode with no problems, but I tried UEFI mode for Ubuntu 11.04. I had the kernel panic on reboot, but not on shutdown. I've tried this with both the Ubuntu precompiled 2.6.38-8-generic kernel and a locally-compiled 2.6.39 kernel from the source at http://www.kernel.org, with the same results with both. Adding "reboot=a,w" to my ELILO options (GRUB 2 is unreliable for me) fixes the problem (although I've not yet tested shutdown). Adding "noefi" to the boot options prevented the system from booting. Also and FWIW, I found a Debian bug report that seems to be of the same problem:
http://lists.debian.org/debian-kernel/2011/05/msg00211.html I took a photo, but it turned out illegibly blurry. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/721576 Title: [natty] kernel panic on reboot with (U)EFI -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs