* Sleeping doesn't work, hibernate sometimes work
* Keyboard buttons for screen brightness doesn't work
* Ambient light sensor doesn't work
* Vsync doesn't work
* Processor always highly clocked, draining battery
I was able to fix some of the issues in Ubuntu by compiling kernel addons of some sort. When I switched to Arch I could with the help of their Wiki fix all of the issues, but there was lot of text config files to edit, and some more compiling of kernel stuff. Even after that I still couldn't get vsync to work properly. Watching youtube while the screen is tearing all the time is very annoying.
If you want to run linux you should get a laptop that is validated to work, like framework or validated dell laptops. At least then you might only need to fix one or two issues.