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:
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.