Bug#984520: 'error: symbol "grub_register_command_lockdown" not found' and then lightdm fails to start
On Thu, Jun 03, 2021 at 11:07:27AM +0200, Jesús Ángel wrote: > I am also facing this error every now and then. Sometimes GRUB doesn't > boot and keeps showing "error: symbol `grub_register_command_lockdown' > not found.". > On pressing any key, GRUB restarts and I get the same error again. If you're getting this non-deterministically, it suggests that you have multiple possible boot disks and either your firmware is picking one or the other inconsistently, or GRUB isn't properly configured to install to the right ones. You should run "dpkg-reconfigure grub-pc" and select all the disks that your firmware might boot from at the "GRUB install devices:" prompt. -- Colin Watson (he/him) [cjwat...@debian.org]
Bug#984520: 'error: symbol "grub_register_command_lockdown" not found' and then lightdm fails to start
Package: grub2
Version: 2.02+dfsg1-20+deb10u4
Followup-For: Bug #984520
Dear Maintainer,
I am also facing this error every now and then. Sometimes GRUB doesn't
boot and keeps showing "error: symbol `grub_register_command_lockdown'
not found.".
On pressing any key, GRUB restarts and I get the same error again.
I can fix the issue by booting into a Knoppix live, mounting the
filesystem under
/mnt, chrooting into it and running grub-install /dev/sda. However, it's
quite
annoying and time-wasting.
I wonder how is it possible to fix the problem just by running the
grub-install
command again. I don't know either what's triggering this issue, but I
think the
one to blame is some kernel upgrade which triggers a grub-update.
Yours faithfully,
-- Package-specific info:
*** BEGIN /proc/mounts
/dev/mapper/root / ext4 rw,relatime,errors=remount-ro 0 0
/dev/vda1 /boot ext3 rw,relatime,errors=remount-ro 0 0
/dev/mapper/var /var ext4 rw,relatime,errors=remount-ro 0 0
*** END /proc/mounts
*** BEGIN /boot/grub/device.map
(fd0) /dev/fd0
(hd0) /dev/vda
(hd1) /dev/vdb
*** END /boot/grub/device.map
*** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root b80ab3af-3b43-40f4-99b1-168a721ea949
else
search --no-floppy --fs-uuid --set=root b80ab3af-3b43-40f4-99b1-168a721ea949
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=30
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=30
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
}
set linux_gfx_mode=
export linux_gfx_mode
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu
--class os $menuentry_id_option
'gnulinux-simple-b80ab3af-3b43-40f4-99b1-168a721ea949' {
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint='hd0,msdos1'
0dfb2e8d-27fe-4ff5-bf51-3d873f3910b9
else
search --no-floppy --fs-uuid --set=root
0dfb2e8d-27fe-4ff5-bf51-3d873f3910b9
fi
echo'Loading Linux 4.19.0-16-amd64 ...'
linux /vmlinuz-4.19.0-16-amd64
root=UUID=b80ab3af-3b43-40f4-99b1-168a721ea949 ro quiet systemd.show_status=1
acpi=force net.ifnames=0 biosdevname=0
rd.luks.name=c9430ec8-ae4b-4a84-9371-9746e87fff7c=root rd.neednet=1
ip=10.0.0.121:::255.255.255.0:tornavacas:eth1:none:10.0.0.103:10.0.0.104
echo'Loading initial ramdisk ...'
initrd /initrd.img-4.19.0-16-amd64
}
submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option
'gnulinux-advanced-b80ab3af-3b43-40f4-99b1-168a721ea949' {
menuentry 'Debian GNU/Linux, with Linux 4.19.0-16-amd64' --class debian
--class gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-4.19.0-16-amd64-advanced-b80ab3af-3b43-40f4-99b1-168a721ea949' {
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio;
fi
insmod
Bug#984520: 'error: symbol "grub_register_command_lockdown" not found' and then lightdm fails to start
On Thu, Mar 04, 2021 at 05:18:18PM +0100, Marco Kühnel wrote: > after the recent update to grub2/202+dfsg1-20+deb10u4, during boot the > mentioned error is thrown. After that, boot continues but lightdm cannot be > started anymore. > This only happens on my laptop containing two bootable hard disks. The > separate boot partitions share /boot/efi and from the second hard disk its > Ubuntu > installation still boots flawlessly. For the Debian installation, /boot and > /boot/efi are both on /dev/sda, but by default the laptop boots from /dev/sdb. What do you mean by "the laptop boots from /dev/sdb"? If your EFI System Partition is on /dev/sda1, then by definition that's where the boot loader lives, unless you're doing something else odd. Do you just mean that your root file system is on /dev/sdb? > Tried: grub-install /dev/sda In UEFI mode, grub-install ignores the device name you give it, and always installs to the EFI System Partition on /boot/efi. Could you please post the full output of "grub-install --debug"? -- Colin Watson (he/him) [cjwat...@debian.org]
Bug#984520: 'error: symbol "grub_register_command_lockdown" not found' and then lightdm fails to start
Package: grub-efi-amd64
Version: 2.02+dfsg1-20+deb10u4
Severity: critical
Tags: d-i
Justification: breaks unrelated software
Hi,
after the recent update to grub2/202+dfsg1-20+deb10u4, during boot the
mentioned error is thrown. After that, boot continues but lightdm cannot be
started anymore.
This only happens on my laptop containing two bootable hard disks. The separate
boot partitions share /boot/efi and from the second hard disk its Ubuntu
installation still boots flawlessly. For the Debian installation, /boot and
/boot/efi are both on /dev/sda, but by default the laptop boots from /dev/sdb.
Tried: grub-install /dev/sda
Best
Marco
-- Package-specific info:
*** BEGIN /proc/mounts
/dev/mapper/caspiansea--vg-root / ext4 rw,relatime,errors=remount-ro 0 0
/dev/mapper/caspiansea--vg-var /var ext4 rw,relatime 0 0
/dev/sda2 /boot ext2 rw,relatime 0 0
/dev/mapper/caspiansea--vg-home /home ext4 rw,relatime 0 0
/dev/mapper/caspiansea--vg-tmp /tmp ext4 rw,relatime 0 0
/dev/sdb2 /home/mac/macOS ext4 rw,relatime 0 0
/dev/sda1 /boot/efi vfat
rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro
0 0
/dev/mapper/data_crypt /home/codecivil/data ext4 rw,relatime 0 0
*** END /proc/mounts
*** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod lvm
insmod ext2
set
root='lvmid/149bgo-7vVx-Jo0z-j1LJ-QhnL-YRKD-4hrfSc/ZGzn4Q-OPbT-4vu1-fXw5-pqed-lS5M-Ua8BXs'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root
--hint='lvmid/149bgo-7vVx-Jo0z-j1LJ-QhnL-YRKD-4hrfSc/ZGzn4Q-OPbT-4vu1-fXw5-pqed-lS5M-Ua8BXs'
e78fa255-2ca7-4d0b-a72e-ab2c6f4d3ea7
else
search --no-floppy --fs-uuid --set=root e78fa255-2ca7-4d0b-a72e-ab2c6f4d3ea7
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=1440x900
load_video
insmod gfxterm
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=5
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
insmod lvm
insmod ext2
set
root='lvmid/149bgo-7vVx-Jo0z-j1LJ-QhnL-YRKD-4hrfSc/ZGzn4Q-OPbT-4vu1-fXw5-pqed-lS5M-Ua8BXs'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root
--hint='lvmid/149bgo-7vVx-Jo0z-j1LJ-QhnL-YRKD-4hrfSc/ZGzn4Q-OPbT-4vu1-fXw5-pqed-lS5M-Ua8BXs'
e78fa255-2ca7-4d0b-a72e-ab2c6f4d3ea7
else
search --no-floppy --fs-uuid --set=root e78fa255-2ca7-4d0b-a72e-ab2c6f4d3ea7
fi
insmod png
if background_image
/usr/share/desktop-base/futureprototype-theme/grub/grub-4x3.png; then
set color_normal=white/black
set color_highlight=black/white
else
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
}
set linux_gfx_mode=
export linux_gfx_mode
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu
--class os $menuentry_id_option
'gnulinux-simple-e78fa255-2ca7-4d0b-a72e-ab2c6f4d3ea7' {
load_video
outb 0x728 1
outb 0x710 2
outb 0x740 2
outb 0x750 0
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod ext2
set root='hd0,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2
--hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2
d64727a5-ce33-4fd8-83be-f941be9779f9
else
search --no-floppy --fs-uuid --set=root
