我运行的是 Ubuntu 22.04，一切都很好。今天我这样做了sudo apt update && sudo apt upgrade，最后我收到了以下警告：
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.15.0-39-generic
Found initrd image: /boot/initrd.img-5.15.0-39-generic
Found linux image: /boot/vmlinuz-5.15.0-37-generic
Found initrd image: /boot/initrd.img-5.15.0-37-generic
Memtest86+ needs a 16-bit boot, that is not available on EFI, exiting
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu …