New answers tagged ubuntu-netbook
The lightest of official Ubuntu versions is Lubuntu. Also there is Ubuntu Netbook Edition specially designed for netbooks (discontinued currently).
I would really like such a function aswell, but I have taken the habit from now on to disable the touchpad before closing the lid with the shortcut (Fn + F7 here, depends on make and model of laptop). Sure, this doesn't solve the problem at all, but it's a big start. If you don't have a keybind preset into your laptop, I'm quite sure there's a way to bind ...
The minimum disk space required for ubuntu is about 7Gb. With 40Gb your system is will work very well. (https://wiki.ubuntu.com/UtopicUnicorn/ReleaseNotes/UbuntuGNOME)
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