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Several days ago Kubuntu stopped booting normally from the GRUB menu (Windows 10 dual boot).

At first I thought it was related to a Windows update but after repairing GRUB and also running update-grub from Kubuntu it still doesn't seem to work:

Error Symptoms

  1. Let the default boot option of Kubuntu start after a 10 second countdown
  2. Blank black screen is shown
  3. Reboot
  4. Select Advanced boot options --> choose another kernel version (normal) 6.2.0-23
  5. Boots into Kubtunu login screen ok

Troubleshooting Steps

  • Removed all USB-C peripherals, disconnected second monitor

  • Cleaned APT packages

  • Changed Nvidia driver package to a older stable version (driver version 525)

Still the same issue persists.

Any ideas?

  • It is a longshot, but I personally would try to see if removing the nvidia drivers altogether would help. My computer could not boot today, despite working without issues yesterday. sudo apt-get purge nvidia* from https://askubuntu.com/a/974910/1644717 helped me resolving it. Trying to just update the nvidia driver from TTY did not resolve the issue for me. – Dudly01 Jun 19 '23 at 15:54
  • Same issue here with Ubuntu 23.04, when I installed kernel 6.2.0-23, and I also use NVidia drivers.

    Since I still have the kernel 6.2.0-20, I can still boot on it. I'm hoping a new NVidia driver (assuming that is the cause) will hopefully fix it.

    Someone should add a test for that, and not allow the release, or create some incompatibility list, and mark the kernel as incompatible with NVidia driver.

    – Jan Jun 23 '23 at 05:53

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