You bought a product and it did not work as advertised. The recommended path would have been to have it serviced or return it to the distributor. You could also attempt to install the correct working drivers, as this most likely would not void your warranty. However, changing the entire OS is a very big not-recommended move on a recently purchased laptop that's having such a simple problem.
It's smothering the candle with a firehose. It's a very destructive solution for which avenues have been paved before-hand to solve such problems. Did it work? Yes. To fix one small problem (malfunctioning WiFi) he rendered himself incapable of doing other things (use Microsoft compatible software, and, no, I'm not including WINE).
In the end, if his purpose was to install Ubuntu, then good for him. However, I wouldn't give it as general advice out of voiding their warranty alone.
You missed the point by two blocks. Which is that OS have bugs. In my case, i was going to instalk ubuntu either way. I was making a counter argument against a comment above. Still, installing another OS does not void the warranty where i reside.