Mark DFP outputs as internal laptop in Ubuntu12.04

[xintan]

For ATI Graphic Card, while the HDMI port is connected to Monitor, "DFP1" is reported to gnome desktop manager. And in Ubuntu12.04, the new gnome also takes “DFP” as a type of laptop , and the OS regard the external “DFP” monitor also as an internal laptop display , then Fn+F4 is pressed, it will make the make_laptop_setup() and make_other_setup() don’t work.

[xintan (xintanchen)]

Action:
Modify gnome_rr_output_is_laptop() in gnome-rr.c
                       Remove the line 1911: strstr (output->name, "DFP")
Thus, “DFP” is not regarded as an internal laptop display, and gnome-desktop can be switched among Clone, Externded and Single.

gnome_rr_output_is_laptop() in gnome-rr.c is needed the related developer's review.

[xintan (xintanchen)]

the related gnome -desktop is gnome-desktop-3.4.1