Hi laerbich
I'm not with Laminar Research, just a fellow simmer in the UK and I have absolutely no experience with Ubuntu.
However, having looked at both of your Log.txt files, it seems as though X-Plane 11 crashed at precisely the same moment on each occasion, with exactly the same log message highlighted in red below.
Unfortunately I'm not able to explain why this is the case, so hopefully someone else with a broader knowledge base can help?
Regards
0:00:04.010 I/REN: Setting texture resolution read from prefs as 4
0:00:04.010 I/REN: Setting |draw view indicator defaulted to 1.
0:00:04.010 I/REN: Setting |dim under high G-load or hypoxia defaulted to 1.
0:00:04.010 I/REN: Setting |draw hi-res planet textures from orbit defaulted to 1.
0:00:04.010 I/REN: Setting |draw forest fires and balloons defaulted to 0.
0:00:04.010 I/REN: Setting |draw birds and deer in nice weather defaulted to 1.
0:00:04.010 I/REN: Setting |draw aircraft carriers and frigates defaulted to 1.
0:00:04.010 I/REN: Setting |draw Aurora Borealis defaulted to 0.
0:00:04.010 I/REN: Setting |runways follow terrain contours defaulted to 1.
0:00:04.010 I/REN: Setting |3-d drawing detail defaulted to 1.
0:00:04.010 I/REN: Setting |water reflection detail defaulted to 0.
0:00:04.010 I/REN: Setting |draw parked aircraft at airports defaulted to 1.
0:00:04.010 I/REN: Setting compress textures to save VRAM defaulted to 1.
0:00:04.010 I/REN: Setting |Effects defaulted to 3.
0:00:04.010 I/REN: Setting |3-d shadows defaulted to 0.
0:00:04.010 I/REN: Setting |HDR anti-aliasing defaulted to 0.
0:00:04.010 I/REN: Setting |draw volumetric fog defaulted to 1.
0:00:04.010 I/REN: Setting |draw per pixel lighting defaulted to 1.
0:00:04.010 I/REN: Setting |atmospheric scattering defaulted to 1.
--=={This application has crashed!}==--
