So I was ricing my Manjaro XFCE install on my Dell XPS 15.
I installed some themes, icons packs and did some custimization to compiz.
Now all was fine and well, till I accidentally applied a conflicting enable of two features on compiz. The window manager stopped working, I couldn't focus any other windows then the terminal and my keybinding weren't working, so I rebooted.
Well now when I log-in to XFCE4 it just shows me a black screen with my cursor. I can open a terminal via ctrl+alt+F2 and have wifi in there.
I tried lot's of different things, but I keep getting the same error from different applications. They all spit out in some form or the other "Cannot open display" with nothing else. This includes xfwm4 --replace, xrandr and compiz --replace.
I have reinstalled both the free and non-free hybrid drivers and tried uninstalling compiz but I can't seem to find how to remove it because pacman says it ain't installed.
EDIT AND SOLVED: The reason I couldn't find the package was because I installed compiz-manjaro, not compiz...
I removed it, purged the config files, reinstalled. And wow it work's again. That was quite stupid...
With this thread to the depth's of the noob helpdesk!!!