I've installed Ubuntu 16.04 LTS on a FS Esprimo V5555 notebook and I cannot see a very big part of the screen. (like I open system settings and the bottom half of it is out of the screen, I can't drag and drop and I can't scroll it) I only have 640x480 resolution in the settings (my notebook can do 1280x800, it has Sis Mirage 3). Same happened in 14.04 LTS. What could be a working solution?
(I am an absolute beginner about Ubuntu)
If this has not been resolved in 18.04 LTS (and I suggest trying that first), another solution would be the use of Windows drivers through ndiswrapper, as documented at the official Ubuntu help page for ndiswrapper.
sudo apt-get install ndisgtkallows you to install the GUI for ndiswrapper.