Keep seeming to have issues with this 20.10 edition of U-MATE . . . today, back into the "grub" "failing to update properly" vis EFI boot . . . keeps happening over and over . . . . Bug report filed.
Today both of my ubuntu 20.10 installs had "grub" packages to upgrade, Lubuntu & U-MATE . . . over the last year?? upgrading grub in ubuntu has managed to wipe the grub listings of the other systems I have installed, leaving only U-MATE to boot up. I've had to use SG2 disk to boot into OpenSUSE to repair the damages done by the ubuntu grub process . . . it keeps happening.
Today I ran the Lu apt dist-upgrade and it had a few grub packages to upgrade . . . I ran them . . . I rebooted and, yep, grub list was again wiped . . . and into U-MATE we went. I ran apt over here and it showed the same grub packages . . . since the damage was already done I ran it. This time it actually showed errors with "grub-install" . . . . I may have other bug reports on this problem, but it seems like ubuntu's grub doesn't get "EFI"??? Devs haven't gotten this issue addressed as of this date?? I copied the data in the console:
Setting up grub-pc (2.04-1ubuntu30) ... Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.4.0-42-generic Found initrd image: /boot/initrd.img-5.4.0-42-generic Found linux image: /boot/vmlinuz-5.4.0-9-generic Found initrd image: /boot/initrd.img-5.4.0-9-generic Found Manjaro Linux (20.1) on /dev/sdb7 Found openSUSE Tumbleweed on /dev/sdb8 Found openSUSE Tumbleweed on /dev/sdb9 Found Mac OS X on /dev/sdc2 Found Ubuntu Groovy Gorilla (development branch) (20.10) on /dev/sdc7 done Setting up grub-efi-amd64-signed (1.151+2.04-1ubuntu30) ... Installing grub to /var/lib/grub/esp. Installing for x86_64-efi platform. Installation finished. No error reported. Installing grub to /var/lib/grub/esp. Installing for x86_64-efi platform. Installation finished. No error reported. Installing grub to /boot/efi. Installing for x86_64-efi platform. Installation finished. No error reported. Installing grub to /var/lib/grub/esp. Installing for x86_64-efi platform. Installation finished. No error reported. Setting up shim-signed (1.43+15+1552672080.a4a1fbe-0ubuntu2) ... Installing for x86_64-efi platform. grub-install: warning: Cannot set EFI variable Boot0000. grub-install: warning: efivarfs_set_variable: writing to fd 8 failed: Invalid ar gument. grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Inval id argument. grub-install: error: failed to register the EFI boot entry: Invalid argument. dpkg: error processing package shim-signed (--configure): installed shim-signed package post-installation script subprocess returned erro r exit status 1 Processing triggers for libc-bin (2.31-2ubuntu1) ... Processing triggers for systemd (246.2-1ubuntu1) ... Processing triggers for man-db (2.9.3-2) ... Processing triggers for install-info (6.7.0.dfsg.2-5) ... install-info: warning: no info dir entry in `/usr/share/info/automake-history.in fo.gz' Errors were encountered while processing: shim-signed E: Sub-process /usr/bin/dpkg returned an error code (1)