I' ve just had a very similar problem with two Compaq nc 8430 laptops -- one had some fan problems so I' ve transferred the disk to other to continue working. I use Ubuntu 8.04. On the new laptop (same as the old one) I had several times this problem -- the mouse pointer moves, either with the touchpad or with a external USB mouse (tried two different ones), but sometimes clicking on the mouse or trackpad did nothing, as described by others in this thread. Frantic alt-tab or changing the active desktop sometimes worked, sometimes not.
I removed /etc/X11/xorg.conf in hopes the system would recreate it, and suddenly everything came back to normal (except I still don't have a /etc/X11/xorg.conf).
I have no idea how or why it worked, but it is working right now. Any clues?
I' ve just had a very similar problem with two Compaq nc 8430 laptops -- one had some fan problems so I' ve transferred the disk to other to continue working. I use Ubuntu 8.04. On the new laptop (same as the old one) I had several times this problem -- the mouse pointer moves, either with the touchpad or with a external USB mouse (tried two different ones), but sometimes clicking on the mouse or trackpad did nothing, as described by others in this thread. Frantic alt-tab or changing the active desktop sometimes worked, sometimes not.
I removed /etc/X11/xorg.conf in hopes the system would recreate it, and suddenly everything came back to normal (except I still don't have a /etc/X11/ xorg.conf) .
I have no idea how or why it worked, but it is working right now. Any clues?