@acebmxer Ubuntu 24.04.00 installed for me! I didn't run any updates during install. Perhaps didn't like something in the kernel that existed in 24.04.3. The 24.04 iso is available under ubuntu old releases.

I can confirm this issue as well. Fresh vanilla install XCP-NG 8.3 on an HP server. Tried multiple builds of the Ubuntu 24 iso and multiple HP servers. All failed consistently. Installed patches on the host, rebooted and it worked. Went to install another VM today and having same issue again. I'm wondering if it was the patches or the reboot of the host that fixed it the last time. Worked fine with XenServer on same box, and I believe it worked fine every time with XCP-NG 8.2 on that same box. Its possible this just happens on XCP-NG 8.3