[SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

amaro · 2021-02-25 21:11:56

Hello everybody!

Yesterday my system froze. I turned it off by the power button. When restarted it got

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block

I tried in GRUB

set root=(hd0,1)
linux /boot/vmlinuz-linux-ck-ivybridge root=/dev/sda1
initrd /boot/initramfs-linux-ck-ivybridge.img
boot

Did not help.

I have Debian on another partition. I chrooted from there.

22:49:43 @ root
 ~ > # mount /dev/sda1 /mnt/arch
 22:49:59 @ root
 ~ > # cd /mnt/arch
 22:50:13 @ root
 /mnt/arch > # mount -t proc /proc proc/
 22:50:19 @ root
 /mnt/arch > # mount -t sysfs /sys sys/
 22:50:39 @ root
 /mnt/arch > # mount --rbind /dev dev/
 22:51:06 @ root
 /mnt/arch > # cp /etc/resolv.conf etc/resolv.conf
 22:51:29 @ root
 /mnt/arch > # chroot /mnt/arch /bin/bash

Here is the output of 'pacman -Qkk'

 / # pacman -Qkk | grep warning
warning: arch-wiki-man: /usr/bin (UID mismatch)
warning: arch-wiki-man: /usr/bin (GID mismatch)
warning: audit: /var/log/audit (Permissions mismatch)
warning: cups: /etc/cups/classes.conf (Permissions mismatch)
warning: cups: /etc/cups/printers.conf (Permissions mismatch)
warning: filesystem: /root (UID mismatch)
warning: filesystem: /root (GID mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.alias (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.alias.bin (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.builtin.bin (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.dep (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.dep.bin (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.devname (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.softdep (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.symbols (Modification time mismatch)
warning: linux-ck-ivybridge: /usr/lib/modules/5.4.2-1-ck-ivybridge/modules.symbols.bin (Modification time mismatch)
warning: python2-gobject2: /usr/lib/python2.7/site-packages/glib/__init__.pyc (Modification time mismatch)
warning: python2-gobject2: /usr/lib/python2.7/site-packages/glib/option.pyc (Modification time mismatch)
warning: python2-gobject2: /usr/lib/python2.7/site-packages/gobject/__init__.pyc (Modification time mismatch)
warning: python2-gobject2: /usr/lib/python2.7/site-packages/gobject/constants.pyc (Modification time mismatch)
warning: python2-gobject2: /usr/lib/python2.7/site-packages/gobject/propertyhelper.pyc (Modification time mismatch)
warning: shadow: /usr/bin/newgidmap (Permissions mismatch)
warning: shadow: /usr/bin/newuidmap (Permissions mismatch)
warning: systemd: /var/log/journal (GID mismatch)
warning: vim-rainbow-parentheses-improved: /usr/share/vim/vimfiles (Permissions mismatch)
warning: vlc: /usr/lib/vlc/plugins/plugins.dat (Modification time mismatch)
warning: vlc: /usr/lib/vlc/plugins/plugins.dat (Size mismatch)

P.S. reinstalling the kernel did not help either.

Any suggestions are highly appreciated!
Thank you in advance!

Last edited by amaro (2021-02-25 23:00:13)

seth · 2021-02-25 21:38:24

P.S. reinstalling the kernel did not help either.

https://archlinux.org/news/moving-to-zs … kinitcpio/ ?

What's "file /mnt/boot/initramfs-linux-ck-ivybridge.img"?

amaro · 2021-02-25 22:26:34

Thank you, seth!

I have read your suggestion. Also have also read this similar thread https://bbs.archlinux.org/viewtopic.php?id=263973.

So I uncommented the 'gzip' option in 'mkinitcpio.conf' file.
Then re-generated the existing presets as the wiki suggests https://wiki.archlinux.org/index.php/Mkinitcpio.

 / # vim /etc/mkinitcpio.conf
[ 00:08:36 root@470 ] 
 / # mkinitcpio -P
==> Building image from preset: /etc/mkinitcpio.d/linux-ck-ivybridge.preset: 'default'
  -> -k /boot/vmlinuz-linux-ck-ivybridge -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-ck-ivybridge.img
==> Starting build: 5.4.2-1-ck-ivybridge
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [autodetect]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
  -> Running build hook: [filesystems]
  -> Running build hook: [keyboard]
  -> Running build hook: [fsck]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-linux-ck-ivybridge.img
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux-ck-ivybridge.preset: 'fallback'
  -> -k /boot/vmlinuz-linux-ck-ivybridge -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-ck-ivybridge-fallback.img -S autodetect
==> Starting build: 5.4.2-1-ck-ivybridge
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: aic94xx
==> WARNING: Possibly missing firmware for module: wd719x
  -> Running build hook: [filesystems]
  -> Running build hook: [keyboard]
  -> Running build hook: [fsck]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-linux-ck-ivybridge-fallback.img
==> Image generation successful

Will reboot now.

amaro · 2021-02-25 22:59:10

Yes.
I am typing this from my working Arch.

Thank you, seth!

I have one question, though...
When installing newer kernels should I disable the 'gzip' option again?

seth · 2021-02-26 07:01:27

zstd is much faster to decompress and therefore introduced as package and initramfs standard.
So if you want those benefits … ;-)

Arch Linux

#1 2021-02-25 21:11:56

[SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

#2 2021-02-25 21:38:24

Re: [SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

#3 2021-02-25 22:26:34

Re: [SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

#4 2021-02-25 22:59:10

Re: [SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

#5 2021-02-26 07:01:27

Re: [SOLVED] Kernel panic - not syncing: VFS: Unable to mount root fs

Board footer