WORKAROUND:
Find server's IP via some external service (Gametracker), then on startup of the game avoid the server browser and instead press ~ to open up the console and type in connect the_servers_ip_addr and it will work just fine.
Fixed in proton 3.16-4
Quake Live crashes Steam after exiting
proton 3.16-4x1 2019-01
This seems to be a Proton specific issue, unless Wine broke something since last time I used it.
Steps to reproduce:
This crash hasn't happened to me when I ran Steam&Quake Live simply via Wine, though last time I did that was a year ago, and I can't actually test it now because downloading doesn't work in current Steam on Wine.
When hosting a local server the issue doesn't appear.
My hardware details:
Linux 4.17.0-1-amd64 SMP Debian 4.17.8-1 (2018-07-20) x86_64 GNU/Linux
GTX 1050Ti
i5 2500k
More details in link below
https://gist.github.com/ca1ek/63c68c3c074abdcdc9330cddf19a1d72
I don't run the suggested drivers. I run 390.77-1 from Debian Buster's repository.
Backtrace:
https://gist.github.com/ca1ek/10709321f2ac610ffb057b00abd8ac0c
I blame Awesomium because Wine in general seems to have great problems with anything that does web rendering, and Awesomium is just repackaged Chromium