I have tried to update and upgrade my Ubuntu version and after updating, my boot screen is displaying a kernel panic message and I'm unable to access my login screen. I believe that part of the update was the kernel.


There is a similar question posted on StackExchange for Ubuntu 16.04, which says to replace the kernel, but I am unsure if this applies to my problem. I don't understand what the output is telling me.

I am using VirtualBox Version 6.1.12 r139181 (Qt5.6.2) for this installation.

  • Can you boot into another kernel? Jan 13, 2021 at 3:01
  • No, I've tried others, but they all go into a kernel panic. Jan 13, 2021 at 3:10
  • What did you last do , it look like you failed a kernel recompilation and rebooted Jan 13, 2021 at 3:11
  • I performed an apt get-update and then and apt-get upgrade. During the upgrade there was a Windows blue screen and now this is what happens when I start Ubuntu within the VirtualBox. Jan 13, 2021 at 3:13

1 Answer 1


Reboot your VM, then hit Esc or Shift button to get into grub, select another kernel.

If not try selecting recovery option in kernel.

Edit , if you cannot boot then you need to use a live linux boot , then chroot into the hosed system a

  • I used "Advanced Options for Ubuntu" to try out different options under Grub, but all have the kernel problem. That includes trying all in recovery mode. So I load a Linux from install disk, and correct from in there? I need to chroot and then... install a new kernel? I'm using Oracle VM VirtualBox Manager in Windows. So I start the live Ubuntu within the VirtualBox, and I can access it like that? Jan 13, 2021 at 3:19
  • That is correct , you can select the ubuntu.iso from the options menu in virtual box , under cd/dvd and set boot order for the cd/dvd to be higher there too Jan 13, 2021 at 3:22
  • 1
    Thanks. I have done that, I loaded from a live CD, used chroot to try to do a new update/upgrade - I used the instructions for "update failure" in help.ubuntu.com/community/LiveCdRecovery However, I now get the error "apt-get: error while loading shared libraries: /lib/x86_64-linux-gnu/librt.so.1: invalid ELF header" Jan 14, 2021 at 1:05
  • Glad you could fix it , good on ya :) Jan 14, 2021 at 1:07
  • Not quite fixed - but making progress - do you have any advice to fix this error that I have now, please? I have recovered my files though, which is great, but would be nice to get the original setup working again. Jan 14, 2021 at 1:08

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