Hi. I get a crash desktop when I try to start a New Game or do the custom battle, in a nut shell anything that goes beyond the Main Menu or Options. I'm using Ubuntu 15.04 (started using it like, a week ago).

I have found out though that in the Wine version of Steam the Gekokujo works almost flawlessly. There are sometimes freezes when video card runs out of memory, but it can be fixed by starting Winetricks and in Change Setting, there are options to change video memory size.

EDIT: Solved it. It wasn't working because of Steam Workshop. I downloaded a Moddb version and extracted it to ~/steamapps/common/MountBlade Warband/Modules so now it's working.