That sounds even more interesting, can you try set debug=peimage with SB enabled as well?
The current shim you have installed should be telling GRUB to not enforce NX, and that was tested to work with SB enabled at least, so I am bit perplexed what's going on here. I think the graphics problem is likely your video driver not being SB signed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2084104 Title: UEFI GRUB2 enforces NX even with a non-NX shim when Secure Boot is disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2084104/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
