I have a Dell Inspiron with Ubuntu 12.04 installed. I can use my touchpad fine but I can't scroll with it. When I run windows it uses two finger scrolling but for some reason it won't work on Ubuntu. I went to my mouse and touchpad settings but there is no touchpad tab, only a mouse tab. When I run xinput list I get the following:
Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ PS/2 Generic Mouse id=13 [slave pointer (2)]
⎜ ↳ PIXART USB OPTICAL MOUSE id=11 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ Laptop_Integrated_Webcam_HD id=10 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ Dell WMI hotkeys id=14 [slave keyboard (3)]
Apparently my touchpad is detected as a PS/2 Generic Mouse. Is there a way to fix this?? I've had this problem with Ubuntu 11.10 and when I upgraded to 12.04 today the problem still exists. The reason this is bugging me is because whenever I type, my pointer goes erratic and often makes me mistype (at least in windows, this happens because I have touchpad driver installed).
psmouse.proto=imps
to the kernel options to try to cure other anomalies. I removed it, and I have the Touchpad configuration screen and multitouch are back. There might be a clue to your case there.