i7-2600
16gb DDR3-1333Mhz
GTX-750 Ti with NVidia Driver version 340.24
Ubuntu 14.04 with Steam Desktop from Thor 27 repository (Adds a SteamOS icon in your login session selector)

I run the game at Ultra settings and it runs flawlessly. No lag, no crash except when I exit the game.

Have you tried lowering the texture cache size? In my case, it gave me a good performance boost before the last 2 upates. Not mentionning solving many game chrashes.

The other thing I found on The Witcher 2 Github is the fact that too many saved games makes it unstable.

Happy W2!

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Linux 3.10... My memory could fool me, but it's the Debian Kernel, isn't it?
Could'nt it be SteamOS?

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