So it seems like this may be related to having secure boot enabled. Please try the following:
1. Re-enable secure boot to see whether the problem returns, then disable again and see if you can boot normally. If the problem still looks to be related to secure boot ...
2. With secure boot disabled, add "lockdown" to the kernel command line, and see if the problem returns.
So it seems like this may be related to having secure boot enabled. Please try the following:
1. Re-enable secure boot to see whether the problem returns, then disable again and see if you can boot normally. If the problem still looks to be related to secure boot ...
2. With secure boot disabled, add "lockdown" to the kernel command line, and see if the problem returns.