Thank you Dave for doing the work of reporting this issue. I have
exactly the same problem on my Thinkpad X1 Carbon. I'll be glad to try
to help if any complementary info is needed.
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Public bug reported:
After the error message, there is a count down and the boot proceeds
normally.
I checked the directory /boot/grub/x86_64-efi/ and hwmatch.mod is not found
there.
I can see it in
/usr/lib/grub/i386-pc/
but not in
/usr/lib/grub/x86_64-efi
ProblemType: Bug
DistroRelease: