Created attachment 120052 [details] backtrace An empty window will pop up and quickly disappear.
Created attachment 120053 [details] apitrace
There is a pinned thread in the War Thunder support forums with a topic like this: https://forum.warthunder.com/index.php?/forum/923-linux-related-problems-and-advice/ Are you running with MESA_GL_VERSION_OVERRIDE=4.1COMPAT ?
Of course.
Xorg log, dmesg, various software versions? When did it work and what do you think changed when it stopped working?
Waiting to see if an update fixes it. Other people were complaining about it on their forums as well so it may not be just mesa.
War Thunder has been updated many times since December, 2015. The issue is fixed now, it requests a 4.1 core profile, not a compat one. Closing.
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