I have been impressed by the System76 laptops as they are designed for and ship with Ubuntu. I strongly feel the most important feature of a portable computer is that it is actually portable, i.e. has a long battery life. I could not find battery life estimates on their webpage. If you have used one of these computers with Ubuntu, how long was it able to run on battery power?
I realize this varies, particularly when turning on an Nvidia card but what has been your experience?
Please feel free to redirect me if this question would be more appropriate somewhere else.