Hi I am new to installing Ubuntu, but have run an installation with the 12.4 alternative iso on my old Imac g4 with Nvidia FX5200 graphics card. The installation completes and I can login and see the top menu bar with display settings etc. but the sidebar has no icons & when I open a window no window appears although it is there. My belief is that the screen resolution is set too high for the monitor (1660x1400 or similar) I can randomly click on menu bars within the invisible windows and have tried to blindly open display settings but only have the option of the high screen resolution.
Has anyone had similar problems?