Hi Archies :)
Using this wiki gave us some little trouble since both methods (1st & Alternate method) do say nothing about necessary ~/.xinitrc configuration.
Yes this is "not to mention" to lot of people.
But some may be in the same situation than me, who did not use .xinitrc before, since I always start from command line : startxfce4 / kde / whatever WM Thereafter I didn't check the ~/.xinitrc file since we installed Arch Linux. And it showed the wrong configuration like "exec fluxbox" --but we do not have that WM installed...
So to say we spent a bunch of time googling before I thought about the .xinitrc :(
I suggest to add a line about one needs to check his ~/.xinitrc after point 5. (Alternate Method)