Comment # 5 on bug 49322 from Kat

Still present in kernels 
3.19.0-031900rc4
3.13.0-44
3.13.0-43
3.13.0-30
3.13.0-29

Also happens with just the DVI-D connector as well. Black screen only way out
is with ALT+SysReq+REISUB

You can't even switch to TTY1-6 with CTRL+ALT+F1-F6