To answer my own question:

If I run unshare -r -n wine … to take away internet access, the game quits in a few seconds instead of slightly over 2 minutes.

Quoting: KlaasTo answer my own question:

If I run unshare -r -n wine … to take away internet access, the game quits in a few seconds instead of slightly over 2 minutes.

That's an interesting find. As a GOG user I've encountered this in a few games inc Witcher 3.

I've always closed the game manually through system monitor. Now I wonder if your command will also fix it for me too.

Thanks

Witcher 3 quits very fast on my setup. The unshare trick crashes the game during start (same for Saints Row 4), but firejail seems to be able to block net access without crashing.

You inspired me to give Just Cause 2 another try. That's one of the last games I cared about that I couldn't get to work in Steam (couldn't even get it to run, never mind d3dcompiler_47). I hadn't tried it in Steam recently with all the Protons and Proton-GE's that I have at my fingertips, but I figured getting it on GoG would be the first step, having more control over the environment.

Manual setup ("Add Game" in Lutris), with the lutris-7.2-2 runner, winetricks and d3dcompiler_47, then installation with offline GoG installer archives via "Run EXE inside Wine prefix". It worked perfectly out of the box with all settings maxed out. I hadn't seen that game in several years, so I played for hours.

It quits properly too (without screwing around with namespaces or otherwise disconnecting network). I was expecting to have the same problem, but no. I was in and out of that game several times last night too (including a few extra quits, testing this behaviour). I do quit to menu first though (Quit Game, and then Enter to get to the main menu and Exit to Windows)

Maybe it's your system wine vs. my Lutris 7.2-2 wine runner.

Interesting.

Remember, if Just Cause 2 randomly crashes, you should first try to disable decals.

Quoting: KlaasInteresting.

Remember, if Just Cause 2 randomly crashes, you should first try to disable decals.

Thank you, no, I didn't know about that (or remember, if I ever saw it)

Quoting: KlaasInteresting.

Just pinging you to say that I have had Just Cause 2 delay on exit as you describe, depending on how I quit. If I'm pissed off at some stupid failed quest and I quit quickly and without going out to main menu first, it seems to stall on exit. Once it stalled for about 20 seconds, but a few minutes ago it stalled for minutes. I left it to see, and came back and it was gone when I got back, so it did eventually quit.

Quoting: Grogandepending on how I quit

I've had no difference quitting from a running game or from the main menu. Even if I quit as soon as the game starts, I get the same behaviour.

And it's always 120…127 seconds for me with internet connection.

Quoting: Klaas

Quoting: Grogandepending on how I quit

I've had no difference quitting from a running game or from the main menu. Even if I quit as soon as the game starts, I get the same behaviour.

That could be a coincidence for me, I haven't had this happen often enough, but every time it's been on a hasty quit. I just didn't want to leave it as "doesn't happen to me".

It may well be bad network programming. That's quite common for (shitty) applications to hang until some response (even a NAK), or timeout, whichever happens first.

Quoting: GroganYou inspired me to give Just Cause 2 another try. That's one of the last games I cared about that I couldn't get to work in Steam (couldn't even get it to run, never mind d3dcompiler_47).

I managed to make it work flawlessly on Steam with GE-Proton7-26. Later versions of GE-Proton don't work. No other trick is required on my PC.