I've just installed Ubuntu on my computer. How do I find the proper drivers for a particular computer hardware peripheral? Assume that I have a AMD display card.
Are there any communities or forums where I can find some driver softwares?
Linux, especially in popular distros like Ubuntu, is excellent at picking drivers automatically. Lots of people have AMD cards. One of my machines has one and I didn't do anything special to use it.
Are you having a driver-related problem?
Is Linux not booting to a graphical display? If not, it might be that systemctl isn't starting the graphical target. You could try this command to see. Mine prints six lines, one of which starts with "Active:": (Press 'q' to get your cursor back.)