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Chris Henesy avatar Ubuntu

Ubuntu 20.04.3 freezes after rebooting, stuck on "Loading initial ramdisk"

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Chris Henesy

Ubuntu 20.04.3 LTS on an Intel NUC11 Enthusiast Mini PC - NUC11PHKi7CAA (Has an Nvidia GPU)

Rebooted today after applying latest software updates, and it no longer boots.
GRUB loads fine, but system freezes with a black screen after GRUB

Research and Troubleshooting: Selecting "Advanced boot options" I see choices for two kernels and their associated "Recovery Mode" options:

  • 5.11.0-43
  • 5.11.0-43 (recovery mode)
  • 5.11.0-41
  • 5.11.0-41 (recovery mode)

None of these 4 work. If I select the recovery mode option for either kernel, I can see that the system is freezing after "Loading initial ramdisk"

Installed latest BIOS (PGTGL579.0065, Released Oct 14, 2021), but it didn't help.

I was able to boot a Ubuntu live CD and unlock all of the encrypted volumes manually.

I ran the Boot Repair Disk Utility, the output of which is here: https://paste.ubuntu.com/p/JrkYFSMSn7/

I successfully chrooted to the root partition of my system's root partition on the internal SSD and ran apt update and apt upgrade successfully, but no new updates were available.

/var/log/dmesg shows a successful boot on 2021-12-19 w/ kernel 5.11.0.43-generic
/var/log/dmesg.0 shows a successful boot on 2021-11-30 w/ kernel 5.11.0.41-generic

Looking at the partition containing the initrd images, I see that both the .43 and .41 versions of the initrd image were modified on 2021-12-23 14:42:05 PM UTC

I rebuilt the ramdisk on the mounted, chrooted boot partition:
update-initramfs -u -v -k 5.11.0-43-generic

And then rebooted. But no luck. What else should I try?

Edit: I see that the following packages were updated on 2021-12-23 14:41:21:

  • netplan.io:amd64 (0.103-0ubuntu5~20.04.3, 0.103-0ubuntu5~20.04.5),
  • gnome-shell-extension-desktop-icons:amd64 (20.04.0-3~ubuntu20.04.5, 20.04.0-3~ubuntu20.04.6),
  • python3-software-properties:amd64 (0.98.9.5, 0.99.9.8),
  • openssl:amd64 (1.1.1f-1ubuntu2.9, 1.1.1f-1ubuntu2.10),
  • update-notifier-common:amd64 (3.192.30.9, 3.192.30.10),
  • libfprint-2-2:amd64 (1:1.90.2+tod1-0ubuntu1~20.04.4, 1:1.90.2+tod1-0ubuntu1~20.04.5),
  • libpulsedsp:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • pulseaudio:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • ubuntu-advantage-tools:amd64 (27.4.1~20.04.1, 27.4.2~20.04.1),
  • google-chrome-stable:amd64 (96.0.4664.93-1, 96.0.4664.110-1),
  • software-properties-gtk:amd64 (0.98.9.5, 0.99.9.8),
  • libfprint-2-tod1:amd64 (1:1.90.2+tod1-0ubuntu1~20.04.4, 1:1.90.2+tod1-0ubuntu1~20.04.5), libpulse0:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • libpulse-mainloop-glib0:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • libmm-glib0:amd64 (1.16.6-2~20.04, 1.16.6-2~20.04.1),
  • libnetplan0:amd64 (0.103-0ubuntu5~20.04.3, 0.103-0ubuntu5~20.04.5),
  • pulseaudio-module-bluetooth:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • modemmanager:amd64 (1.16.6-2~20.04, 1.16.6-2~20.04.1),
  • linux-firmware:amd64 (1.187.20, 1.187.23),
  • libssl1.1:amd64 (1.1.1f-1ubuntu2.9, 1.1.1f-1ubuntu2.10),
  • pulseaudio-utils:amd64 (1:13.99.1-1ubuntu3.12, 1:13.99.1-1ubuntu3.13),
  • update-notifier:amd64 (3.192.30.9, 3.192.30.10),
  • software-properties-common:amd64 (0.98.9.5, 0.99.9.8)

I assume that one of these updates triggered the rebuild of the initrd image, but am not sure which, or what to do about it.

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