OpenSUSE booting menu normally shows up, then I select “OpenSUSE Leap 15.4”, then nothing.
PC keeps on a black screen with only classic terminal white underscore flashing in loop.
I don’t even know what to google out on the net. It’s just a fresh install and I didn’t even added a single repository so that can’t be the problem.
Yesterday I also tried installing Ubuntu Studio (trying to decide the best distro for my studio PC) and happened quite the same.
But it also reported like “Unknown filesystem” with something about the grub.
That’s not enough information for us non-clairvoyants to go on. Can you provide some specific specifications about what you are trying to install on? What is a “Studio PC”? Brand? Model? CPU model? Graphics model(s)? Display size, type & resolution or model?
Was there a working operating system on it before you tried Ubuntu? Is it still there? Did you try to replace Ubuntu with openSUSE, or add it to whatever was already there?
When the blinking underscore appears, can you get a login prompt to show by striking Ctrl-Alt-F3? Are there messages to see by striking Ctrl-Alt-F1 or Ctrl-Alt-F10?
If you boot the installation media and select to boot the installed system, does it succeed? If not, what does happen?
At the Grub menu, what happens if you select any of the advanced options instead of the default?