(In reply to Nicolai Hähnle from comment #2)
> Do you see the issue also in an apitrace? If so, could you upload it?

Yes, I can! Find the trace at
<http://dev.carbon-project.org/debian/mesa.bugs/96762/firewatch.trace>. You'll
need your login credentials – you should have from a previous trace file – to
download it (I just want to prevent needless traffic, if I should reset your
password, let me know and I e-mail you a new one); other known Mesa developers
without login credentials can contact me by private e-mail and I'm happy to set
them up.

The trace shows the launch of the game and then the graphics settings menu as
shown in attachment 124836 [details].

Let me know, if you need something else.