Welcome to the entry-point for Ubuntu on Lenovo ThinkPad laptops.
ThinkPad model support matrix
Thinkpads have an accelerometer that can sense if you drop your laptop and make the hard drive brace for impact. To enable this, install the tp-smapi-dkms and hdapsd packages. Then load the tp-smapi kernel module
sudo modprobe tp-smapi
Then restart hdapsd
sudo /etc/init.d/hdapsd restart
Other official Ubuntu documentation and support pages that are specific to ThinkPads.
Ubuntu Certified - Lenovo - List of Ubuntu-certified Lenovo models.
acpi_ibm package man page - ACPI drivers package specific for IBM laptops.
Thinkfan man page - A simple ThinkPad-specific fan control program.
Ask Ubuntu - Questions related to ThinkPad on Ask Ubuntu.
If you can't find what you're looking for in the Ubuntu wiki, try one of these external resources.