re. how many
This problem was nothing to do with any shortcomings of hardware manufacturers. It was caused by Ubuntu refusing to install a hardware driver that it decided was not needed. The operating system made an 'executive decision' that put the user at a disadvantage.
Over the past two years, I have made 4 attempts to install Ubuntu or Debian on my desktop or my laptop computer. Each time, something has gone wrong. The first time, it refused to load because it could not find the wireless card driver (it said); I wasn't even using WiFi at the time. The second time, it identified both my hard drives and asked where to install. I told it which one, then it formatted both of them and refused to install. When I tried Debian, it went through the installation process then stopped with an error message claiming that the CPU temperature was some ridiculous value then it shutdown. The last time I tried to install Ubuntu, it fouled up again and I couldn't be bothered to figure it out.
My conclusion:- I'm not touching that pile of rubbish again.
When I downloaded the Win-7 beta last year, it installed smoothly and quietly with no fuss at all, on my six year old laptop, then found all my other devices on the network.
I'd love to use Linux, I really would, but it won't let me and as far as I'm concerned it's not good enough yet. Maybe they will have fixed it in another two years.