No opening screen after ubuntu installation

enes.selcuk

After ubuntu installation it gets stuck on "blocksclean" screen. I have an AMD processor on my computer. The processor does not have a graphics card feature. Also I am using an external RTX graphics card. What can be the problem.

https://www.linkpicture.com/q/ubuntu-xcp-ng-advanced.png
https://www.linkpicture.com/q/ubuntu-xcp.png

Xcp-ng 8.2
XOA :xo-server 5.70.0
xo-web 5.74.0

stormi

Looks like this documented issue: https://xcp-ng.org/docs/troubleshooting.html#ubuntu-18-04-boot-issue (found by looking up "ubuntu" in the docs)