distro=Linux Mint
release=Linux Mint 22.1 Xia base: Ubuntu 24.04 noble
last updated 4/11/2025
kernel=6.8.0-57-generic
BIOS=Insyde 3.07, also reporting for 3.05
Laptop 13model=AMD Ryzen 7040U
LM Forum Topic referenced [https://forums.linuxmint.com/viewtopic.php?p=2537374#p2537374] is regarding a problem that develops during an install from the live ISO. Helping my brother over the phone install the Cinnamon edition on his brand new FW 13 AMD 7040U, we aborted (QUIT) the install during the “Installation type” step [Install Linux Mint — Linux Mint Installation Guide documentation]. We had earlier partitioned the SSD using gparted in live session, so were trying to tell the installer to place EFI into a FAT32-formatted partition, system (/) into a second EXT4-formatted partition, home into a third EXT4-formatted partition (/home). To do that, we selected the “Something else” radio button. With the SSD pre-formatted, we could not specify our desired options, so aborted the install to RTFM some more. When we tried to boot into the live session again (several times) we got the error message:
Failed to open \EFI\BOOT\mmx64.efi - Not Found
Failed to load image **: Not Found
Failed to start MokManager: Not Found
Something has gone seriously wrong: import_mok_state
On examination, there’s no \EFI\BOOT\mmx64.efi on the stick AND SHOULDN’T BE. There is a “work around” for this, i.e., renaming grubx64.efi to mmx64.efi. I sniffed at this and did not like the odor. I speculate that this issue - at least the origin of the message naming mmx64.efi - comes from using Balena Etcher to write the ISO to a live stick - because we used a Windows-native application on a W10 system to “burn” the live stick. Again, that is speculation on my part.
SOLUTION: Caveat: I will need to edit in correct Insyde naming
- WITHOUT THE LIVE STICK, boot the machine, tapping F2 to take you into BIOS editing.
- Go to the Secure boot options. Select “delete efi database” (or whatever). F10 save and exit. Power off.
- Reboot, F2 again, > Secure boot settings again. Select “Restore factory secure boot settings” option. F10 to save and exit. Power off.
- Insert your LM live stick. Power on and F12 to select boot medium. You should only see the stick here. Even if you see the HDD or SSD, select the stick, then use down arrow to select . Now select grubx64.efi. System booted properly for us . . .
- We then went into the install routine (double click on LM Install DVD icon). In Chose installation type we went to “Something else”, recorded the partition sizes we had created, then selected “Create new partition table”. In that dialog, we recreated our partition set up, this time selecting “EFI” for the EFI partition format (. . .p1), EXT4 and Mount point / for p2, EXT4 and mount point /home for p3. We also added a p4 swap and a p5 btrfs to accomodate Windows legacy file structure and files. The LM install routing handled this partitioning and formatting gracefully. and we moved on.