Neil Woolford wrote:
Next thing I'll try is reverting the secondary display to analogue connection and see what happens then when I run dispwin -r on it. If that works, then I think we have our answer. I'll research the Formac documentation, just in case there is something internal to the monitor.Still no joy. Dispwin works as far as displaying colour squares goes, but no overall brightness change, even with the monitor connected via the analogue cable.
Did you try it with plain X11 (ie. no multi-monitor extensions configured) ? Graeme Gill.