Comment 0 for bug 1931136

[Impact]
This is a regression in shim 15.4 that causes a crash in shim when chainbooting.

Also, the machine resets when you exit grub, rather than going back to the EFI shell when launched from it.

[Test plan]

TODO for the chainboot, something similar to https://github.com/lxc/lxd/issues/8770

For grub exit, we can easily launch VM and then EFI shell and then load shim from in there, type exit in grub and should be back to EFI shell.

[Where problems could occur]
In exiting shim, failure to boot, etc.