I intended to try out e17 on updated cauldron (also have KDE, Razorqt, LXDE, xfce)
But when i log in the screen immediately blacks out (no background light, no pixels seen)
Fortunately Ctrl-Alt-F4, and in blind logging in as root and issuing reboot worked
Unfortunately i had set autologin so I could not change DE but it just went blackagain...
Rebooted in safe mode, then startx as root and i got logged in as root in KDE, and could switch off autologin easily.
(Yes an example when logging in as root saved me experimenting time)
Someone else use e17 here ?