*IF* you don't change it.... or dare to dream by suspending it and expecting it to come alive again exactly the way it was before. Double headed may or may not work. Yeah, other then that it is stable.
Oh and you need linux support for all the hardware in your machine. And have the fortune that all new (within the last 10 years) features of your device are supported in the available linux driver. Not to mention whether it will support dual graphics cards.
And before you go on saying 'x' distro does it, or 'y' distro does it.. we don't always have the choice of all distros due to dependencies or legal reasons.
Linux is good, maybe even great, but it is not without its headaches. Personally I find Windows to be the most headache free OS. OS/X loses out in my mind because they have sacrificed a lot to make the UI basic and simple, and that is a matter of personal preference.