So after upgrading my system I’m getting SIGSEGV from Xorg.
Here is the GDB stack info:
Paste.cz – gdb X
Any hints to what might be wrong?
Right now I have switched and forced reinstalled all packages to the official repository (oss + updates).
OK, so as always 5 minutes after I post on the forums, I manage to solve it myself 
This was really a great problem. So, basically, somehow (maybe when transferring configuration between machines) Nvidia drivers got installed on my notebook where I have an Intel GPU. The problem was that Nvidia drivers provide their own version of some of the base libraries that the Intel driver is using. And of course, this version was incompatible with the Intel driver.