This is really weird. When i run KSP from Steam using primusrun (or optirun), it runs with low fps, no anti-aliasing, and stuff like that, so i assume in runs on Intel graphics card (but ksp.log says otherwise). But, if change the in-game render quality slider from medium to low, hit accept, and then change it back, i get high fps, anti-aliasing, and some stuff that happens only when using primusrun (tearing in one specific spot (happens in every game) and UI flickering when looking at water). My laptop configuration is: Intel Core i3-3120M 2,5 GHz Nvidia GeForce GT 740M Fedora 19 x86_64