I have upgraded the 3rd of my machines (desktop) from 9.10 to 10.04 using the upgrade/update manager.
Whilst busy with the installing section the machine locked up and I had to reboot. The upgrade wasn't fully done yet.
I then installed a new kernel for 10.04 and updated the grub loader to load the newly installed kernel (2.6.35-22).
The problem I have is that once you log into a user, the desktop (Gnome) does not display applications correctly. There is no option to X=Exit -=minimize etc at the top of the display i.e. Firefox, or Terminal etc.
There is also just one desktop and you cannot create more desktops nor open them.
I then created a new user. The same problem occurred. I then logged into the one user and whilst being logged in I logged into the other user. Now the desktop was correct, but the machine is very slow and tends to hang up.
Once you log out or re-boot the machine, it reverts to the problem.
It seems as if there is a conflict in the programs running on the desktop. You cannot e.g close any application by clicking on the "x" as there is now x on any screen. Also if you open eg Firefox and a terminal in the one desktop, you cannot type anything in the terminal, it freezes up.
Any idea how to try and fix this without doing a clean install....