I have an Acer Travelmate P240 N16Q1 which had happily been single-booting Ubuntu 14.04, and this weekend I decided to upgrade to 18.04. Which is where things have gone off the rails.
Following (attempted) installation, I'm getting the following error message:
Failed to open \EFI\BOOT\mmx64.efl - Not Found
Failed to load image \EFI\Boot\mmx64.efl: Not Found
Failed to start MokManager: Not Found
Something has gone seriously wrong: Import_mok_state() failed
: Not Found
It is now not possible to boot anything while UEFI is on. If I switch from UEFI to Legacy, I can boot USBs, but as soon as I turn UEFI back on, I get the above message. No matter what I'm trying to boot.
I booted boot-repair in Legacy mode, and the results are at http://paste.ubuntu.com/p/ykq8nxdGkV/
BIOS setting are limited. There are no options regarding fastboot, etc. Secure Mode is "regular" (with no programs specified) and TPM is off.
As noted, this was working happily until the upgrade. All advice deeply appreciated.
Thanks, S