Bug#932127: grub-common: Fails loading snapshot after snapper rollback
Thomas Schneider
74cmonty at gmail.com
Mon Jul 15 15:58:06 BST 2019
Package: grub-common
Version: 2.04-1
Severity: important
-- Detailed issue description
After finalizing Debian installation I installed additional packages to
make usage of Btrfs' snapshot functionality:
- btrfs-progs
- snapper
Then I started installation of package "reportbug":
apt install reportbug
Snapper automatically created a snapshot pre and post the installation.
This is exactly what is expected.
Then I initiated rollback of this installation:
snapper rollback 3
(where 3 represents the snapshot ID of the pre snapshot).
This created another 2 snapshots with ID 5 and 6; snapshot 6 becomes the
new default snapshot then.
To verify the new default snapshot I use this syntax: btrfs su get-default /
and this correctly returns this:
ID 272 gen 3658 top level 261 patch @snapshots/6/snapshot
This is the time to reboot the system.
However, when system is back from reboot the package "reportbug" is
still installed; I verified this simply by entering this: apt-cache policy r
eportbug
Please check attached screenshots documenting these steps and the
current Grub menu commands.
-- Workaround
Deleting the string
rootflags=subvol=@
from the linux line in Grub will boot the system and use the
(previously) defined default snapshot 6.
-- Package-specific info:
*********************** BEGIN /proc/mounts
/dev/sda2 / btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=257,subvol=/@ 0 0
/dev/sda2 /var/cache btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=259,subvol=/@cache 0 0
/dev/sda2 /btrfs btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=5,subvol=/ 0 0
/dev/sda2 /tmp btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=260,subvol=/@tmp 0 0
/dev/sda2 /home btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=258,subvol=/@home 0 0
/dev/sda1 /boot/efi vfat
rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro
0 0
/dev/sda2 /.snapshots btrfs
rw,noatime,compress=lzo,space_cache=v2,subvolid=261,subvol=/@snapshots 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 part_gpt
insmod btrfs
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
1c1783ac-b490-4252-aced-b30addce
3607
else
search --no-floppy --fs-uuid --set=root
1c1783ac-b490-4252-aced-b30addce3607
fi
font="/@/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=5
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
}
set linux_gfx_mode=
export linux_gfx_mode
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class
gnu --class os $menuentry_id_option 'gnulinux-simple-1c1783ac-b490-4252-ac
ed-b30addce3607' {
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod btrfs
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 1c1783ac-b490-4252-aced-
b30addce3607
else
search --no-floppy --fs-uuid --set=root
1c1783ac-b490-4252-aced-b30addce3607
fi
echo 'Loading Linux 4.9.0-9-amd64 ...'
linux /@/boot/vmlinuz-4.9.0-9-amd64
root=UUID=1c1783ac-b490-4252-aced-b30addce3607 ro rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /@/boot/initrd.img-4.9.0-9-amd64
}
submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option
'gnulinux-advanced-1c1783ac-b490-4252-aced-b30addce3607' {
menuentry 'Debian GNU/Linux, with Linux 4.9.0-9-amd64' --class
debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnu
linux-4.9.0-9-amd64-advanced-1c1783ac-b490-4252-aced-b30addce3607' {
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod
lzopio; fi
insmod part_gpt
insmod btrfs
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
1c1783ac-b490-42
52-aced-b30addce3607
else
search --no-floppy --fs-uuid --set=root
1c1783ac-b490-4252-aced-b30addce3607
fi
echo 'Loading Linux 4.9.0-9-amd64 ...'
linux /@/boot/vmlinuz-4.9.0-9-amd64
root=UUID=1c1783ac-b490-4252-aced-b30addce3607 ro rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /@/boot/initrd.img-4.9.0-9-amd64
}
menuentry 'Debian GNU/Linux, with Linux 4.9.0-9-amd64 (recovery
mode)' --class debian --class gnu-linux --class gnu --class os $menuentr
y_id_option
'gnulinux-4.9.0-9-amd64-recovery-1c1783ac-b490-4252-aced-b30addce3607' {
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod
lzopio; fi
insmod part_gpt
insmod btrfs
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
1c1783ac-b490-42
52-aced-b30addce3607
else
search --no-floppy --fs-uuid --set=root
1c1783ac-b490-4252-aced-b30addce3607
fi
echo 'Loading Linux 4.9.0-9-amd64 ...'
linux /@/boot/vmlinuz-4.9.0-9-amd64
root=UUID=1c1783ac-b490-4252-aced-b30addce3607 ro single rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /@/boot/initrd.img-4.9.0-9-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 ###
menuentry 'System setup' $menuentry_id_option 'uefi-firmware' {
fwsetup
}
### 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 /dev/disk/by-id
total 0
lrwxrwxrwx 1 root root 9 Jul 15 16:21 ata-QEMU_DVD-ROM_QM00003 -> ../../sr0
lrwxrwxrwx 1 root root 9 Jul 15 16:21
scsi-0QEMU_QEMU_HARDDISK_drive-scsi0 -> ../../sda
lrwxrwxrwx 1 root root 10 Jul 15 16:21
scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jul 15 16:21
scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 Jul 15 16:21
scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part3 -> ../../sda3
*********************** END /dev/disk/by-id
*********************** BEGIN /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 10 Jul 15 16:21
1c1783ac-b490-4252-aced-b30addce3607 -> ../../sda2
lrwxrwxrwx 1 root root 9 Jul 15 16:21 2019-04-14-11-35-22-00 -> ../../sr0
lrwxrwxrwx 1 root root 10 Jul 15 16:21 F124-D7CB -> ../../sda1
lrwxrwxrwx 1 root root 10 Jul 15 16:21
c2dcd19c-2f56-4fff-83d5-b5230d7845ce -> ../../sda3
*********************** END /dev/disk/by-uuid
-- System Information:
Debian Release: 9.9
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable'), (100,
'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-9-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8),
LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages grub-common depends on:
ii gettext-base 0.19.8.1-2
ii libc6 2.28-10
ii libdevmapper1.02.1 2:1.02.137-2
ii libefiboot1 37-2
ii libefivar1 37-2
ii libfreetype6 2.6.3-3.2
ii libfuse2 2.9.7-1+deb9u2
ii liblzma5 5.2.2-1.2+b1
Versions of packages grub-common recommends:
ii os-prober 1.76~deb9u1
Versions of packages grub-common suggests:
ii console-setup 1.164
pn desktop-base <none>
pn grub-emu <none>
pn multiboot-doc <none>
pn xorriso <none>
-- no debconf information
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