(still rough translation)
I have a Sony Vaio vgn-aw180fu with Ubuntu 12.04 Precise Pangolin. Everything was fine, until I opened a terminal to install
cairo updates that the Update Center wouldn't let me install stating that those were untrusted packages.
Upon installing the updates, the screen froze; I waited and nothing happended, so I forced a shutdown.
Then I installed
Google Earth, which previously the Software Center couldn't [sic] install, and the screen froze again. Again I waited but it didn't change. I forced shutdown once again, and then Ubuntu would not start. From
grub I entered to "repair ubuntu", and selected "repair damaged packages" and could log in again.
The laptop touchpad no longer had the normal functions, one being that the pointer moves too fast; this is the least important, and what bothers me most is that the double tap (double click) to open or move windows does not work anymore.
This has happened to me before and I had to uninstall and install it all over again. I read that there are many problems with the touchpad for notebooks with Ubuntu. It's a good system that has made me much satisfied and comfortable but the touchpad problems and not knowing how to correct them make it very uncomfortable
I might try try with another Linux distribution. Greetings.