Created attachment 130451 [details]
The Steam game Grand Ages:Medieval crashes instantly after startup.
Please tell me what further information you need, this is my first bug report.
Created attachment 130452 [details]
Created attachment 130453 [details]
*** Bug 100388 has been marked as a duplicate of this bug. ***
Created attachment 130454 [details]
basic system information
And probably a similar problem described in the steam community:
The game requests a 4.1 compatibility profile which is unsupported by Mesa and it crashes because it doesn't check the return value of glXCreateContextAttribsARB.
I'm investigating in order to know if it's possible to add a driconf option, but it looks like the game really needs some unsupported features.
Okay, the game uses ARB_texture_buffer_object which is only exposed with a core profile for some reasons. I'm able to run the game with some hacky changes but it fails to render correctly at some point.
Unfortunately, I don't think we can do anything for it because compat >= 3.1 is not supported for now (and probably won't be in the near future).
Anyways, the game should not crash when the returned context is NULL.
That doesn't sound to bad, does it?
At least it looks like the problem could be isolated.
Thanks and I'm happily trying fixes as long they're not exhausting my capabilities.
This game should now be playable using MESA_GL_VERSION_OVERRIDE=4.1COMPAT MESA_GLSL_VERSION_OVERRIDE=410 after the following commit:
Author: Timothy Arceri <email@example.com>
Date: Tue May 8 10:35:40 2018 +1000
mesa: remove hard-coded OpenGL 3.2 compat limit
Just let validate_context_version() do it instead. This fixes
MESA_GL_VERSION_OVERRIDE for compat, it will also allow us to
enable new compat versions on a per driver bases in future.
Reviewed-by: Marek Olšák <firstname.lastname@example.org>
There are still bits missing in compat but the game seems playable with the overrides.
Since further work simply involves implementing compat profile I'm going to close this bug.