Ubuntu
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  1. Bug #2019287
  2. Comment #2

Comment 2 for bug 2019287

Revision history for this message
Steve Langasek (vorlon) wrote :

The problem is shown in the dpkg log:

E: Your kernels are not signed with a key known to your firmware. This system will fail to boot in a Secure Boot environment.

And your bug report shows that you have SecureBoot enabled.

So, grub is saving you from having an unbootable system and is warning you about it.