I'm new to Arch, so be kind :)
When I start X, it doesn't output the right screen size to my monitor so there is about an inch and a half of black on the right side that my mouse can't get in to.
No problems installing Xorg.
Problem showed in the desktop environment as well as plain old xorg, so it can't be the DE.
Looked in /etc/X11 for .conf files, but the only ones there were for input devices.
No graphics card. Just the built-in VGA.