Well this'll have to wait since another problem came up. ./pslaunch displays a black window, named Crystal Space Application, and everything that is in there are white letters in the upper left corner :
Server status
All servers are up!
And that's all. Previously it also showed something like "updates available" and it seems that I clicked yes (it still was a simple black screen without anything on it), because I saw in console that updating began. Any ideas?
Edited
Alrgiht, got it fixed. Let's head back to the older problem - the segfault

. Now PS crashes just after I press PLAY button or just after I ./psclient instead of ./pslaunch. Seems that ./psclient directly launches the game, but that doesn't matter since the game won't work anyway. psclient also shows some interesting error messages:
DEBUG: Initializing OpenAL sound system
DEBUG: Retrieving available devices.
DEBUG: Default OpenAL device: '((sampling-rate 44100) (device '(native))
DEBUG: No device specified
DEBUG: Falling back on default device
DEBUG: Can't retrieve attributes size: OpenAL error ALC_INVALID_DEVICE
Segmentation faultreal classy, isn't it?
Seems that the sound is srewing the whole thing, not the video. Anyway, how to fix it?