Hello @verkohltesToast, issues with games using Proton are being tracked in the Proton issue tracker, so I've transferred this issue report.
Please add PROTON_LOG=1 %command% to the game's launch options and drag and drop the generated $HOME/steam-$APPID.log into the comment box. Also, please copy your system information from Steam (Steam -> Help -> System Information) and put it in a gist, then include a link to the gist in this issue report.
I'm sorry for this mad question but what exactly do you mean with $HOME/steam-$APPID.log? I looked up my home, steam and xPlane directory and didn't find such a file. But I just set my Steam language to English and copied the system information here: https://gist.github.com/verkohltesToast/3fa5ac52961c1b52a45e8bd0977b165f
Thank you for your help
When running a game with PROTON_LOG=1 set, a log should be generated in your home folder. That set aside, your issue is that you're currently using mesa/nouveau which does not support Vulkan, which is a prerequisite for DXVK. Please install a recent nVidia proprietary driver version and retest.
Alternatively, you could try adding PROTON_USE_WINED3D=1 %command% to tell Proton to use the DirectX 11 to OpenGL render path, but expect substantial performance issues.
I swichd to the proprietary driver and the Game runs now. Thank you very much for your help
PROTON_LOG=1x2 2019-07PROTON_USE_WINED3D=1x1 2019-07PROTON_USE_WINED3D=1 %command%x1 2019-07
My system information
The Issue:
After starting the Game "xPlane 11" viaSteamPlay (any Proton version) it first starts the loading screen normally. Then it crashes and shows a message telling me that the software has crashed. The complete starting process is in the following Video:
2019-07-12 17-18-27.flv.zip
I'm sorry for sending it in German but changing it would require a reinstallation of xPlane.
Steps for reproducing this issue:
I think (didn't try):