If it helps, I experienced this exact issue. Kerbal Space Program - 0.25.0.0 (LinuxPlayer) Steam OS: Linux 3.13 Ubuntu 14.04 64bit CPU: Intel® Core i5-3570K CPU @ 3.40GHz (4) RAM: 15932 GPU: GeForce GTX 770/PCIe/SSE2 (2048MB) SM: 30 (OpenGL 4.4 [4.4.0 NVIDIA 331.38]) RT Formats: ARGB32, Depth, ARGBHalf, RGB565, ARGB4444, ARGB1555, Default, DefaultHDR, ARGBFloat, RGFloat, RGHalf, RFloat, RHalf, R8 Log of a flight is here. This particular one has FAR and Kerbal Joint Reinforcement installed. Steps: Launch from steam new sandbox game vab, launch only a command pod It gets launched into the atmosphere immediately. The problem goes away in both the 32 bit and 64 bit versions if launched without steam. The problem also goes away if you follow the steps at http://forum.kerbalspaceprogram.com/threads/86488-How-to-make-Steam-run-64-bit to force steam to run the 64 bit version.