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context: this question: Ubuntu no longer boots after reinstalling graphics driver

I have reinstalled Ubuntu 22.04 according to these instructions: https://help.ubuntu.com/community/UbuntuReinstallation I picked the same partition that my old broken installation was on, set the mount point to / and did not check format.

The installation finished without and error and then I tried to boot, but got the following error:

Gave up waiting for root file system device. Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! UUID=<uuid> does not exist. Dropping to a shell!

BusyBox v1.30.1 (Ubuntu 1:1.30.1-7ubuntu3) built-in shell (ash)
Enter 'help' for a list of built-in commands.


(initramfs)

After this the screen is unresponsive (I cannot enter commands here.)

After some googling I found that I should press e in the menu where I can choose between Ubuntu and Advanced Options for Ubuntu and check whether the two UUIDs mentioned there are the same (which they are).

I did notice that when I go to Advanced option and pick Ubuntu, with Linux 5.17.0-1020-oem I get the aforementioned error, but if I pick Ubuntu, with Linux 5.15.0-52-generic it boots normally, I can log, get the gnome desktop, can access the file system etc...

Once I was logged in I did a sudo grub-update, which didn't seem to change anything.

Addressing the common problems in the error message (everything done booting with linux 5.15, if that matters): cat /proc/cmdline returns BOOT_IMAGE=/boot/vmlinuz-5.15.0.52-generic root=<uuid> ro quiet splash where is the same uuid as in the error message, no mention of a rootdelay.

cat /proc/modules returns a lot of values, that I don't understand, don't know how I would find out what is missing?

ls /dev also return a lot of output, but again I don't know how I would know something is missing.

Anyone able to help out here?

HBnet
  • 71
  • The 5.17 oem is a problematic kernel and you should be using the 5.15 – David Oct 28 '22 at 06:38
  • @David thanks, I'll probably do that, could you tell my why 5.17 oem is a problematic kernel? – HBnet Oct 28 '22 at 07:30
  • Only that it does not work and when it does not all hardware is supported. Helped a user the other day that Bluetooth would not work with 5.17oem but all is good with 5.15 – David Oct 28 '22 at 08:08
  • @HBnet where do you press e to choose? I have the same problem and I can't find it. – Saeed Neamati Apr 19 '23 at 10:10
  • You don't need to press e to choose. You will have to enter the grub menu. It's been a while but I believe you need to press or hold Esc during boot to get there. You should be able to select a kernel version under the Advanced Options – HBnet Apr 22 '23 at 16:43

1 Answers1

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Is that kernel version "5.17.0-1020-oem" what you intended to install? If you don't need that version, you can remove it from your environment. I think you should use kernel version "5.15.0.52-generic".

  • check kernel versions installed on your environment $ dpkg --list | grep linux-image
  • remove unnecessary version $ sudo apt-get purge linux-image-5.17.0-1020-oem
  • check kernel versions again (confirm that kernel version was removed) $ dpkg --list | grep linux-image
  • update grub $ sudo update-grub
Fumio Nakayama
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  • I never explicitly installed any kernel version. But my solution has been so far to just set 5.15 as the default – HBnet Dec 08 '22 at 11:17