nixos: k0: xorg: quad 2560x1440 setup
nixos: k0: xorg: quad 2560x1440 setup

Unfortunately, the new QNIX TRUE10 DP (DisplayPort) monitors are not
overclockable (cannot go beyond 60 Hz refresh rate). Also, the older
QNIXes which are DVI-D output cannot be overclocked anymore because they
have to be used with an adapter (active DP to DVI). Thus I have to use
factory settings on all monitors. The end result, though, is a much
simpler xorg configuration. The only thing I have to keep using is the
DPI option to set all monitors at 108x108 DPI.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg