(In reply to David Disseldorp from comment #0) > # Installation finished. No error reported. > # Could not delete variable: Invalid argument > # >>>>>>>>>>>>>>>> The error was emitted by libefivar, the library used by efibootmgr to operate on UEFI variables. Something went wrong in the process of deleting efi variable, most likely an ioctl has failed, for eg unsettling immutable flag of to-be-deleted efivarsfs files, or similar ...