为什么我收到“警告：不会执行 os-prober 来检测其他可启动分区。” 运行“apt升级”后？

Question

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 entry for UEFI Firmware Settings ...
done

据我所知，os-prober当在同一台计算机上安装多个操作系统时使用，那么为什么会出现此警告？我只安装了 Ubuntu 22.04。是因为找到了两个内核吗？

Memtest86+ 已经在评论中解决了，但是呢os-prober？

以下是 的内容/etc/default/grub：

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

Answer 1

警告是由 生成的/etc/grub.d/30_os-prober，看一下第 43 到 59 行：

if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then
  grub_warn "$(gettext_printf "os-prober will not be executed to detect other bootable partitions.\nSystems on them will not be added to the GRUB boot configuration.\nCheck GRUB_DISABLE_OS_PROBER documentation entry.")"
  exit 0
elif [ "x${GRUB_DISABLE_OS_PROBER}" = "xauto" ]; then
  # UBUNTU: We do not want to disable os-prober on upgrades if we found items before.
  if test -e /boot/grub/grub.cfg && ! grep -q osprober /boot/grub/grub.cfg; then
    grub_warn "$(gettext_printf "os-prober will not be executed to detect other bootable partitions.\nSystems on them will not be added to the GRUB boot configuration.\nCheck GRUB_DISABLE_OS_PROBER documentation entry.")"
    exit 0
  fi
fi

if ! command -v os-prober > /dev/null || ! command -v linux-boot-prober > /dev/null ; then
  # missing os-prober and/or linux-boot-prober
  exit 0
fi

grub_warn "$(gettext_printf "os-prober will be executed to detect other bootable partitions.\nIts output will be used to detect bootable binaries on them and create new boot entries.")"

您有多种选择：

• 忽略警告，这只是警告，不是错误。

• GRUB_DISABLE_OS_PROBER=false在 中设置变量/etc/default/grub。os-prober will be executed to detect...正如我们在脚本片段中看到的那样，警告将更改为。

• 从 中删除可执行位/etc/grub.d/30_os-prober。这将阻止脚本的执行，因此您不会收到任何此类警告。您可以通过以下方式做到这一点：

  sudo chmod -x /etc/grub.d/30_os-prober
  

• 编辑脚本/etc/grub.d/30_os-prober。如果您用 注释掉这些行grub_warn，脚本将运行而不会发出这些警告。