“Steam on Linux” just means that some weird Ubuntu version got a package with tested dependencies, and is currently not of any fun to install on a real linux like debian provides.
So, the idea is fire up the windows 7 virtual machine and install Steam and Counter Strike in there. Not a problem at all – except for the mouse movements.
After a while, I figured 2 things:
* the vm must not use the absolute pointing device (“absolutes zeigegerät aktivieren”) in “Settings” – “System”
* the game itself requires at least “raw mouse input”
Then it’s time for …Fire in the hole….!