What if you set SHIM_VERBOSE in firmware, using 'sudo mokutil --set-
verbosity true' after booting with just grub?
There should be debug messages showing up on screen to tell what is
going on in shim in this case, and having those will help in debugging
the issue.
** Changed in: shim (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1849863
Title:
shim-signed does not boot on Lenovo Yoga C630 WOS with enabled Secure
Boot
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