OK, I did the upgrade to 17.10 and regretted it shortly thereafter: - gnome on wayland is not possible. I use the nvidia GTX 1050 graphics card, a rather popular card I would think, but no: 17.10 won't work with it. The tweaks I googled are for more adventurous people than me. - so I use UNITY at login. Important shortcuts don't work anymore: CTRL ALT T does not give me the terminal. SHFT PrtScn does not work, etc.
Can somebody explain what is going on?
171102: additional info on shortcuts: I can take a screenshot from the terminal, but with following message:
alaindef@alan9:~$ gnome-screenshot -a
** Message: Unable to select area using GNOME Shell's builtin screenshot interface, resorting to fallback X11.
with this method from terminal, I can take a screenshot, but with the shortcut SHFT-PrtScn, it does not work. Also most other shortcuts do not work anymore.
171107: I gave up trying to work with Unity because my shortcuts are gone, and I gave up looking for wayland because NVIDIA GTX 1050 will probably not like it. So I choose the "gnome on xorg" desktop. Although I miss some good stuff of Unity, it gives me back the shortcuts and it offers interesting features, like the workspaces.