[Trustedgrub-users] Error 13 on loading kernel after installing Trusted Grub

[Ariel S. <as...@mi...>]

I installed Trusted Grub on a CentOS 5.4, 64-bit machine yesterday.
It's a fairly fresh CentOS install, with basically nothing except 
trousers and tpm-tools on it, running on a Dell Latitude d830. There 
were no errors during the Trusted Grub installation process, and the 
machine booted with no problems ~20 minutes before I installed tGrub. 
This is not a dual-boot machine; the entire hard drive was wiped during 
the CentOS installation.

Unfortunately, upon rebooting the machine, I am now dropped into a grub 
shell. Trusted Grub is clearly running, has detected the TPM, and does 
not print any errors; however, not only is there no normal grub menu, 
any attempt to load a kernel by hand produces "Error 13: Invalid or 
unsupported executable format". I'm clearly detecting the drive and can 
find the kernel images, along with the other /boot files. These aren't 
anything weird like Windows, just ordinary CentOS kernels that were 
booting just fine in grub yesterday using the exact same commands. 
Providing the kernel command with an explicit type argument does not 
make any difference.

I can't come up with any reason that Error 13, in particular, would be 
produced. I'll reinstall grub and try again if need be, but I'd prefer 
to have some idea of exactly what might have caused the error so I can 
fix it on the next time through. Has anyone seen this sort of problem 
before? Can you recommend any solutions, or even more informative tests?

                 Thanks,
                    Ariel