Appeared on kubuntu 20.10 today, after new gtub-efi-amd64-signed version appeared in the repository:
Setting up grub-efi-amd64-signed (1.155.4+2.04-1ubuntu35.4) ... Installing grub to /boot/efi. Installing for x86_64-efi platform. grub-install: warning: Cannot set EFI variable Boot0000. grub-install: warning: efivarfs_set_variable: writing to fd 7 failed: Invalid argument. grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument. grub-install: error: failed to register the EFI boot entry: Invalid argument.
Appeared on kubuntu 20.10 today, after new gtub-efi- amd64-signed version appeared in the repository:
Setting up grub-efi- amd64-signed (1.155. 4+2.04- 1ubuntu35. 4) ... set_variable: writing to fd 7 failed: Invalid argument. variable_ mode: ops->set_variable() failed: Invalid argument.
Installing grub to /boot/efi.
Installing for x86_64-efi platform.
grub-install: warning: Cannot set EFI variable Boot0000.
grub-install: warning: efivarfs_
grub-install: warning: _efi_set_
grub-install: error: failed to register the EFI boot entry: Invalid argument.