Hello, I'm using a recent install of centos 7, no GUI customizations that I recall. When I log in using the GUI it accepts my password and the mouse appears on a black screen, like it is preparing the desktop, but the desktop never appears. If I hit control-alt-f4 and log in using the command line, and then execute startx, Everything seems to work perfectly. What sort of troubleshooting should I do to figure out what is stalling? I'm not at all familiar with this aspect of things. thanks, Dave