I use xrandr as well. May it be really related to software rendering? Is there a way to determine the rendering device?

It is still very slow when there is nighttime

It has just turned out that the game is running slow only when it's started in a monitor with 90deg rotation, even if I drag the window to other monitor with no rotation. It runs OK if I start it in the normal one. Perhaps there is some issue with the size of the window.

I have two monitors, but both are connected to gforce. There is a 100% CPU usage. About 50% Factorio and 50% x.org

I have a linux machine with opensuse 12.3 intel core 2 duo 2.33GHz 6 GB RAM and GeForce 7600 GS I've set the config to make use low graphics, but still i start a new game and it's incredibly slow right away. When I run, the screen updates about once in a second. May it be a fault in my system config...