Yes I confirm this your feedback. I could see that there is a big bug in GNOME version 3.34 for PPC64el. The problem lies precisely in GNOME as the problem also occurs on Ubuntu as well as on Fedora and is the same problem. Me if I noticed by chance, when I installed the first time Ubuntu 19.10, after downloading the GNOME 3.34, rebooting the system, just loaded it all, it irreversibly stopped everything. I had to reboot and realized that there was a big problem and since it worked in server mode, I immediately realized that it could be the GNOME 3.34. Then I installed Fedora 31 as soon as it came out and did the same procedure as the 30 or after installing the server version, I installed the XFCE package. I started Fedora 31 and everything was ok. At that point I decided to install the GNOME 3.34 and after the start there were no problems whatsoever. I realized that my suspicions were well founded when, due to a mistake, I had to reinstall Fedora. Yes, because this time I put the GNOME first as a desktop environment and as soon as I restarted Fedora froze exactly the same way as Ubuntu. At that point I had confirmation of the GNOME problem. At the same time, however, I realized that if you install the XFCE first and then from inside that, put GNOME then the problem doesn't exist and it works. If instead you want to put GNOME from the beginning, then everything stops irreversibly. At that point I also understood that Ubuntu could work in the same way and in fact after the server installation ranking, I put XFCE, then GNOME and so I also made Ubuntu 19.10 work ...