I have a Sony VAIO VPCF22S1E. I just upgraded from 11.04 to 11.10 . While upgrading (on downloading packages step) I lost my internet connection and 2-3 minutes later it resumed. I continued to download packages. And finally, upgrading is completed. Now I'm using 11.10 . But when I log in to Ubuntu after 2 minutes the touchpad will be unresponsive. I can't use it or the integrated buttons.
The Disable touchpad while typing option is turned off (suggested from this answer) but it did not solve the problem.
How can I sure my packages downloaded and installed successfully? (As I said, I lost my connection while downloading packages)
PS: I can use USB mouse.
PPS: I have tried
apt-get update ,