Steel Division 2 (919640)

Compatibility Report

• Name of the game with compatibility issues: Steel Division 2
• Steam AppID of the game: 919640

System Information

• GPU: GTX 760 OC 2GB
• Driver/LLVM version: NVIDIA 435.21
• Kernel version: 5.3.0-26
• Link to full system information report as Gist: https://gist.github.com/g90215/b3205234f4826c300ac27cdbe804b80b
• Proton version: 4.11-12

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

steam-919640.log

Symptoms

Issue#1. Tree foliage textures don't appear unless zoomed right in to ground level, and even then it's hit or miss. The trunks are always visible.
Issue#2. Random whole-game lockups which never recover. When it hangs, the latest line in the Proton log always contains the same deadlock:
err:ntdll:RtlpWaitForCriticalSection section 0xaf31c90 "?" wait timed out in thread 004f, blocked by 0053, retrying (60 sec)

Reproduction

Issue#1. Launch the first tutorial. All trees on the map will be missing foliage.
Issue#2. Lockups happen randomly. Mostly on launching and exiting the game, but sometimes in loading screens. Never during gameplay as far as I have tested.

I have tried the following:
-With esync enabled the game runs smoother, although seems to hang more often.
-With DV9K enabled the game runs smoother. It appears to have no effect on stability
-WINED3D11 renders only the GUI, trees (albeit with glitches), buildings and units. It does not render the terrain.
-Forcing Steam to use older Proton versions all the way up to 4.11-12
-Disabling Steam overlay
-Fullscreen and windowed modes
-Setting the CPU governor to Performance
-Verified the game integrity
-Disabling/enabling shader pre-caching
-The latest available (435) proprietary and older NVIDIA drivers for Ubuntu
-Various in-game video options (all presets, using autosettings, etc)
-Both the game and my system are fully updated.
-ulimit -HN is 1048576

Start with steam-919640.log and the linked system information report, then reproduce the first tutorial and the reported launch, exit, and loading-screen lockups using Proton 4.11-12. Done means tree foliage renders reliably and the game no longer reaches the reported deadlock.