OK, as a first pass at getting my two graphics cards working in a dual head mode I’ve made the following key changes to my XF86Config-4 file. This is by no means exhaustive, but should give a few reference notes to refer to. A HantsLUG wiki entry is planned 🙂
First off the Device sections. I had an original one for my NVidia card along these lines:
Section "Device" Identifier "NVidia GeForce MX 440" Driver "vesa" # Driver "nv" # Driver "nvidia" Option "UseFBDev" "true" BusID "PCI:1:0:0" EndSection
Note that the two commented out lines are due to switches back and forth with the NVidia drivers. So far the vesa one is the only on that has consistently worked and for my usage is doing me fine for now!