On Sat, 11 Jun 2022, Tony Camuso wrote:
OK, so something is going wrong with the information that tboot is
forwarding to the kernel launch.
On the efi system, with "noefi" removed from the grub command line,
the system boots.
With "noefi" in the grub command line, Device Mapper cannot find
the root and swap devices and drops to the dracut prompt.
How can I determine what info efi is providing that tboot is not?
Where can I instrument the code to gain that visibility?
I'm not too familiar with dracut but I'd imagine you can unpack the
initramfs and investigate how it works. It might be easiest to spawn a
shell at some point.
Can you reproduce the problem if you do a fresh install? What distribution
is this? If you have easy steps to reproduce this I can try to take a
look. I'm normally on Debian so will need good instructions for other
distros :)
-Timo
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