openSUSE 13.1 Clean install random logout

I am user of openSUSE since ver 12.3 but currently i am using clean installation of openSUSE 13.1 x64. I have random logouts during for example browsing internet through Firefox or using konsole etc.
My config is:
AMD x4 740
AMD HD7750 running fglrx not open radeon driver.

Here are my Xorg.logs:

After one of these random logouts, I’d recommend inspecting your syslog to hopefully see what might have been happening just prior to the event (with any luck you <might> have even captured the event itself).

I’d think you should be looking at this instead