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Ubuntu 22.04 on Dell Precision 3560: Boot fails with failure to start network manager and dbus message bus

id flag

The Dell Precision 3560 is single-boot, running Kubuntu 22.04.

Here's a picture of what happens when I try to boot: boot failure errors

The ACPI BIOS errors don't seem to be the cause. When I tried booting with acpi=off, I got this: boot failure errors with acpi=off

This happens with both the wireless adapter and wired. Could the cause be dbus failing to start? I am able to boot into recovery and resume normal boot, but can't get past the user login screen of sddm. Upon entering my password I am brought back to the login screen.

I'd appreciate any help with troubleshooting this.

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id flag

It was indeed dbus.

  • At the grub menu, I entered 'e' to edit grub before booting.
  • I appended " 3" to the boot command (beginning with linux)*.
  • Ctrl+x brought me to the text console.
  • After logging in, I did sudo systemctl start dbus.service.
  • This showed me that the libdbus giving the error was /home/linuxbrew/.linuxbrew/lib/libdbus-1.so.3.

I had added /home/linuxbrew/.linuxbrew/lib as a shared library location using ldconfig – learned the hard way that this is not a good idea. After I removed this shared library location, I was able to boot as usual.

*Learned this from this post.

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