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I tried installing XUbuntu 22.04 on Hyper-V and it installs fine but after installation and reboot, the screen goes black with a flashing screen.

I was able to watch F1 output until it gets to:

Starting Hostname Service ...
tmp-sanity\x2dmount...

After which the black screen starts.

I was able to trigger Ctrl+Alt+F3 but the login only shows for a second and then goes black again.

I think this is a driver issue but I have no idea on how to resolve.

Any ideas on how to fix this?

Notes:

  • Ubuntu Desktop 22.04 works fine
  • Only have RDP access to the Hyper-V server so I'm a bit limited on control.
3

2 Answers

This issue is likely caused because the VM was installed using Generation 1 virtual machine. Try installing the VM as Generation 2 instead.

Note: to install vm as generation 2, you must disable secure boot under HyperV VM Settings -> Security -> Secure Boot Enabled (uncheck).

Note: This does not seem to fix issues with XUbuntu 20.04 which still gets black screen. In this case, you will need to boot into single user mode and install linux-azure package.

The way to fix this is by installing linux-azure package as follows:

  1. Boot into single user mode
    • At Grub menu, select main entry and click e to edit
    • Find line that starts with linux and add single after ro remembering to add spaces before and after
    • Hit F10 to reboot
  2. At prompt, start networking: systemctl start NetworkManager.service
  3. apt update and install linux-azure
apt-get update
apt-get install linux-azure
  1. Reboot restart -r now

Your system should boot super fast and should work just fine.

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