Oct 23 07:55:31 ubuntu grub-installer: Installing for x86_64-efi platform. Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: Cannot read EFI Boot* variables. Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: efivarfs_get_variable: read failed: Interrupted system call. Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: efi_get_variable: ops->get_variable failed: Interrupted system call. Oct 23 07:55:31 ubuntu grub-installer: grub-install: error: failed to register the EFI boot entry: Interrupted system call. Oct 23 07:55:31 ubuntu grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.
Oct 23 07:55:31 ubuntu grub-installer: Installing for x86_64-efi platform. get_variable: read failed: Interrupted system call.
Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: Cannot read EFI Boot* variables.
Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: efivarfs_
Oct 23 07:55:31 ubuntu grub-installer: grub-install: warning: efi_get_variable: ops->get_variable failed: Interrupted system call.
Oct 23 07:55:31 ubuntu grub-installer: grub-install: error: failed to register the EFI boot entry: Interrupted system call.
Oct 23 07:55:31 ubuntu grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.