I've got a interesting problem when I tried to install this.
I have a system with a AMD FX-6300 processor, 32 gigs of ram and a Nvidia GTX 970 graphics card.
I tried installing this and selected non-free so I would get the nvidia drivers installed when it installs it.
The USB stick boots up and I get the desktop, go through the install and on reboot, I select Manjaro in the grub and get the normal text at first, then the monitor goes into a screen saying it cannot see a signal. I wait a long time, but never get a display on the installed system. I even tried editing the grub entry and adding nomodeset, didn't do anything either. I didn't try using free instead of non-free.
I had a week or two ago tried the RC2 of the 17.0.2 XFCE using non-free on this same system and I didn't have this happen when booting up the installed system. RC2 of XFCE booted fine. I haven't tried the full release of 17.0.2 of XFCE though.
Wish I knew why lxde gives me a can't see signal on the screen, when xfce works fine.