I am seeing this problem as well on a Intel 965. Hardy was fine, but the multiple display support in Intrepid for XFCE and KDE is horrid. Here are my findings:
1) XFCE:
a) xrandr can re-position screens to above/below, but not absolute
b) xrandr not change the resolution of the external monitor, it is always the same as the laptop monitor's resolution
2) KDE:
a) KDE session crashes/exits every time I connect the external monitor
b) KDE session crashes/exits sometimes when I attempt to change the resolution
c) When KDE does not crash, it has the same symptoms as XFCE w/ xrandr
3) Gnome is working fine, correct resolution & positioning
I am seeing this problem as well on a Intel 965. Hardy was fine, but the multiple display support in Intrepid for XFCE and KDE is horrid. Here are my findings:
1) XFCE:
a) xrandr can re-position screens to above/below, but not absolute
b) xrandr not change the resolution of the external monitor, it is always the same as the laptop monitor's resolution
2) KDE:
a) KDE session crashes/exits every time I connect the external monitor
b) KDE session crashes/exits sometimes when I attempt to change the resolution
c) When KDE does not crash, it has the same symptoms as XFCE w/ xrandr
3) Gnome is working fine, correct resolution & positioning
Too bad Gnome is the one I like the least