property_live: I've got quite a view crashes in that quest but not at that exact spot. For me reloading a previous save worked after a few times. I still get random crashes but the game is playable - with a lot of quicksaving.
I hope you get your way around that bug. The story is worth it.
;-) System Specs: Distro: Kubuntu 15.04 64bit
Kernel: Linux 3.19.0-28
CPU: i5-4460
GPU: AMD R9 380
GPU-driver: fglrx 15.20.2
RAM: 16GB
i have Linux Mint 17 an similar PC but my GraphicCard is a Nvidia Geforce 8800 with many quicksave it is playable but is crash too. I have copy the Rootdirectory from Witcher2 of my extern HDD and it was i little bit better. My speculation Witcher 2 under Linux is very instabil.