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 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 } menuentry 'Debian GNU/Linux, with Linux 4.19.0-16-amd64 (recovery mode)' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.19.0-16-amd64-recovery-b80ab3af-3b43-40f4-99b1-168a721ea949' { load_video insmod gzio if [ x$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 single echo 'Loading initial ramdisk ...' initrd /initrd.img-4.19.0-16-amd64 } menuentry 'Debian GNU/Linux, with Linux 4.19.0-14-amd64' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.19.0-14-amd64-advanced-b80ab3af-3b43-40f4-99b1-168a721ea949' { load_video insmod gzio if [ x$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 4.19.0-14-amd64 ...' linux /vmlinuz-4.19.0-14-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-4.19.0-14-amd64 } menuentry 'Debian GNU/Linux, with Linux 4.19.0-14-amd64 (recovery mode)' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.19.0-14-amd64-recovery-b80ab3af-3b43-40f4-99b1-168a721ea949' { load_video insmod gzio if [ x$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 4.19.0-14-amd64 ...' linux /vmlinuz-4.19.0-14-amd64 root=UUID=b80ab3af-3b43-40f4-99b1-168a721ea949 ro single echo 'Loading initial ramdisk ...' initrd /initrd.img-4.19.0-14-amd64 } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/30_os-prober ### ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/30_uefi-firmware ### ### END /etc/grub.d/30_uefi-firmware ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### *********************** END /boot/grub/grub.cfg *********************** BEGIN /proc/mdstat cat: /proc/mdstat: No such file or directory *********************** END /proc/mdstat *********************** BEGIN LVM *********************** END LVM *********************** BEGIN /dev/disk/by-id total 0 lrwxrwxrwx 1 root root 9 May 6 17:55 ata-QEMU_DVD-ROM_QM00001 -> ../../sr0 lrwxrwxrwx 1 root root 10 May 6 17:55 dm-name-root -> ../../dm-0 lrwxrwxrwx 1 root root 10 May 6 17:55 dm-name-var -> ../../dm-1 lrwxrwxrwx 1 root root 10 May 6 17:55 dm-uuid-CRYPT-LUKS2-7fa8598c555f410fb89f14a6a6ae353c-var -> ../../dm-1 lrwxrwxrwx 1 root root 10 May 6 17:55 dm-uuid-CRYPT-LUKS2-c9430ec8ae4b4a8493719746e87fff7c-root -> ../../dm-0 *********************** END /dev/disk/by-id *********************** BEGIN /dev/disk/by-uuid total 0 lrwxrwxrwx 1 root root 10 May 6 17:55 0dfb2e8d-27fe-4ff5-bf51-3d873f3910b9 -> ../../vda1 lrwxrwxrwx 1 root root 10 May 6 17:55 7fa8598c-555f-410f-b89f-14a6a6ae353c -> ../../vdd1 lrwxrwxrwx 1 root root 9 May 6 17:55 7fffd436-7f75-430d-8f47-3d8f9e60e039 -> ../../vdb lrwxrwxrwx 1 root root 10 May 6 17:55 acc0acde-199e-4d18-ab21-c6e95a98490c -> ../../dm-1 lrwxrwxrwx 1 root root 10 May 6 17:55 b80ab3af-3b43-40f4-99b1-168a721ea949 -> ../../dm-0 lrwxrwxrwx 1 root root 10 May 6 17:55 c9430ec8-ae4b-4a84-9371-9746e87fff7c -> ../../vdc1 *********************** END /dev/disk/by-uuid -- System Information: Debian Release: 10.9 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.19.0-16-amd64 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages grub2 depends on: ii grub-common 2.02+dfsg1-20+deb10u4 ii grub-pc 2.02+dfsg1-20+deb10u4 grub2 recommends no packages. grub2 suggests no packages. -- no debconf information