Loading Xen in OpenSUSE 42.1 ends with a black screen, how to fix?

Question

linux

I chose to boot from Xen in the boot menu, as a result I get a black screen.
What logs do you need to look at to understand what's going on?
The console mode turns on, when you try to start the X
startx
, it says that the X is already running.
Without xen it is loaded without problems. Nvidia video card.
Thanks in advance!