For -intel especially, displayconfig-gtk doesn't work very well. The new Screen Resolution applet should be much better (although see https://wiki.ubuntu.com/X/Config for remaining manual configuration steps required.)
Also, displayconfig-gtk is being deprecated - see https://wiki.ubuntu.com/X/DisplayConfigGtk for details.)
For -intel especially, displayconfig-gtk doesn't work very well. The new Screen Resolution applet should be much better (although see https:/ /wiki.ubuntu. com/X/Config for remaining manual configuration steps required.)
Also, displayconfig-gtk is being deprecated - see https:/ /wiki.ubuntu. com/X/DisplayCo nfigGtk for details.)