When I booted 11.10 from the Install CD, everything worked fine.
However, once I installed Ubuntu, my trackpad stopped working - does anyone know why this is so?
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First, make sure we're both experiencing the same problem. Run the following in a terminal:
You should see something like the following:
Identifier "touchpad catchall" Driver "synaptics" MatchIsTouchpad "on"
Now, you need to add the PPA - for precise instructions on how to do that, take a look here.
The PPA you need to add is
Now, update your system - run the following in the terminal:
sudo apt-get update && sudo apt-get dist-upgrade
What that command does:
First part updates your system software list - this tells the computer where the software is that it needs to download.
The second part does the actual update of your system software.
Once that's done, reboot your computer - your trackpad should be working now.
After the reboot, you'll want to update/tweak your touchpad settings.
System Settings > Mouse and Touchpad, and then switch to the touchpad tab, and you'll see something like this:
You can play around with those settings as much as you want, just so you can figure out what works best for you.