How can I get f.lux working?
Having the same problems with f.lux and there doesn't seem to be any fix for this right now.
But Redshift seems to work fine on Ubuntu 12.04.
gtk-redshift in Ubuntu Software Centre
I got f.lux working by downloading the xflux daemon available from http://justgetflux.com/linux.html. I cannot get the GUI panel to open but can configure xflux via the command line and the f.lux icon says it is active.