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Upgrade ubuntu 18.04 to kernel 5.3.0-26-generic from kernel
5.0.0-37-generic using normal
apt update and apt upgrade
grub as generated by grub-mkconfig
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os
$menuentry_id_option 'gnulinux-simple-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2
--hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2
4d2c870a-9768-4667-b12a-33f74d31c9da
else
search --no-floppy --fs-uuid --set=root
4d2c870a-9768-4667-b12a-33f74d31c9da
fi
linux /vmlinuz-5.3.0-26-generic
root=UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 ro rootflags=subvol=@ quiet
splash $vt_handoff
initrd /initrd.img-5.3.0-26-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option
'gnulinux-advanced-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
menuentry 'Ubuntu, with Linux 5.3.0-26-generic' --class ubuntu --class
gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-5.3.0-26-generic-advanced-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio;
fi
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2
--hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2
4d2c870a-9768-4667-b12a-33f74d31c9da
else
search --no-floppy --fs-uuid --set=root
4d2c870a-9768-4667-b12a-33f74d31c9da
fi
echo 'Loading Linux 5.3.0-26-generic ...'
linux /vmlinuz-5.3.0-26-generic
root=UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 ro rootflags=subvol=@ quiet
splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-5.3.0-26-generic
}
menuentry 'Ubuntu, with Linux 5.3.0-26-generic (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-5.3.0-26-generic-recovery-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio;
fi
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2
--hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2
4d2c870a-9768-4667-b12a-33f74d31c9da
else
search --no-floppy --fs-uuid --set=root
4d2c870a-9768-4667-b12a-33f74d31c9da
fi
echo 'Loading Linux 5.3.0-26-generic ...'
linux /vmlinuz-5.3.0-26-generic
root=UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 ro recovery nomodeset
rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-5.3.0-26-generic
}
menuentry 'Ubuntu, with Linux 5.0.0-37-generic' --class ubuntu --class
gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-5.0.0-37-generic-advanced-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio;
fi
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2
--hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2
4d2c870a-9768-4667-b12a-33f74d31c9da
else
search --no-floppy --fs-uuid --set=root
4d2c870a-9768-4667-b12a-33f74d31c9da
fi
echo 'Loading Linux 5.0.0-37-generic ...'
linux /vmlinuz-5.0.0-37-generic
root=UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 ro rootflags=subvol=@ quiet
splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-5.0.0-37-generic
}
menuentry 'Ubuntu, with Linux 5.0.0-37-generic (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-5.0.0-37-generic-recovery-5bf582e8-676d-4c58-a555-f4623dcc70e3' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio;
fi
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt2
--hint-efi=hd1,gpt2 --hint-baremetal=ahci1,gpt2
4d2c870a-9768-4667-b12a-33f74d31c9da
else
search --no-floppy --fs-uuid --set=root
4d2c870a-9768-4667-b12a-33f74d31c9da
fi
echo 'Loading Linux 5.0.0-37-generic ...'
linux /vmlinuz-5.0.0-37-generic
root=UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 ro recovery nomodeset
rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-5.0.0-37-generic
}
}
/etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb5 during installation
UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 / btrfs
defaults,subvol=@ 0 1
# /boot was on /dev/sdb2 during installation
UUID=4d2c870a-9768-4667-b12a-33f74d31c9da /boot ext4 defaults
0 2
# /home was on /dev/sdb5 during installation
UUID=5bf582e8-676d-4c58-a555-f4623dcc70e3 /home btrfs
defaults,subvol=@home 0 2
/boot/swapfile none swap sw
0 0
# user disk
UUID=08e9f1ce-81d5-4c46-828d-5bfff1a6dd5a /media/xxxx/big2tb
btrfs defaults,noatime,space_cache,autodefrag,discard,compress=lzo
UUID=513657b4-58f5-4973-955f-f1b0638d7a50 /media/xxxx/b8
ext4 defaults,noatime
# SSD tweak: temporary directories as tmpfs
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/log tmpfs defaults,noatime,mode=1777 0 0
The system was not booting using the last kernel. In recovery also I was
left with an unresponsive keyboard and not able to enter any options
such as continue booting, enter root whatever.
After trial and errors I commented out the following entry in the fstab.
UUID=08e9f1ce-81d5-4c46-828d-5bfff1a6dd5a /media/xxxx/big2tb
btrfs defaults,noatime,space_cache,autodefrag,discard,compress=lzo
The system was booting normally after using the last kernel.
I did try to mount the same disk after booting and got the message.
can't read superblock on /dev/sdc1.
The same disk works perfectly with Linux Lite.
I did a try with the last lubuntu 19.10 (booting from usb stick) and
also got for the same message for the same disk
can't read superblock on /dev/sdc1.
** Affects: ubuntu
Importance: Undecided
Status: New
--
can't read superblock on /dev/xxxx sdc1 in my case
https://bugs.launchpad.net/bugs/1860590
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