If you're getting low FPS with Warband, try the following:
Enable single threading. Open the "~/.wine/drive_c/users/your_user_name/My Documents/Mount&Blade Warband/rgl_config.txt" (change the path to reflect your Warband installation) configuration file and set "force_single_threading" attribute to 1.
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Freezing when entering World Map
by Petr Zvěřina on Tuesday April 2nd 2013, 11:28
So, I have Warband installed via Steam, and it runs flawlessly... until I try to leave the merchant and get on the world map. It just freezes and nothing else. I tried the standalone version with Wine and it does the same thing. I think it's something broken about new versions of Wine or soemthing with 1.15x version(s) of Warband. Can't be sure, though.
by Heldar on Friday September 14th 2012, 14:06
I have a very bad FPS (about 20-40 with any video settings) on my AMD Phenom II X6 1075T with 8GB RAM and GeForce GTX 550 Ti with openSUSE 12.2. But the solution is very easy: just need to enable single threading. To do it please open the "~/.wine/drive_c/users/your_user_name/My Documents/Mount&Blade Warband/rgl_config.txt" configuration file and change the "force_single_threading" field to 1. And now I have ~60 FPS on Very High settings or 120 FPS (cap in rgl_config) on Low Video settings.