Hi Philipp: I try switch to minimal all graphics settings. My last test was, remove libopenal, and then, not crash, but does not load the plugin, by the following errors: Fetching plugins for /home/rafa/X-Plane 10/Aircraft/X-Aviation/CRJ-200/plugins dlerror:/home/rafa/X-Plane 10/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl: undefined symbol: alDeleteBuffers Aircraft/X-Aviation/CRJ-200/objects/Cockpit_Main.obj:11781 VT 0.8453 0.1314 2.3871 0.000 0.000 -0.000 0.3622 0.6477 WARNING: object Aircraft/X-Aviation/CRJ-200/objects/Cockpit_Main.obj has normals of the wrong length. Aircraft/X-Aviation/CRJ-200/objects/Cockpit_PanelCentral.obj:17027 VT -0.0214 -0.0073 2.3929 0.000 0.000 -0.000 0.2487 0.7596 WARNING: object Aircraft/X-Aviation/CRJ-200/objects/Cockpit_PanelCentral.obj has normals of the wrong length. Aircraft/X-Aviation/CRJ-200/objects/Cockpit_PanelSuperior.obj:7425 VT -0.1676 0.7291 2.4940 0.000 0.000 -0.000 0.6399 0.8161 WARNING: object Aircraft/X-Aviation/CRJ-200/objects/Cockpit_PanelSuperior.obj has normals of the wrong length. Aircraft/X-Aviation/CRJ-200/objects/Cabin.obj:22035 VT 0.3409 0.7517 16.1731 0.000 0.000 -0.000 0.8924 0.0639 WARNING: object Aircraft/X-Aviation/CRJ-200/objects/Cabin.obj has normals of the wrong length. Clean exit from threads. I attach the graphics settings and the log.txt I'm now with Ubuntu 11.10 updated today. Many thanks again Log.txt