I've had a quick play through of the game on both 3.16-4 and 4.2-1 and I'm not having any issues besides the occasional stutter. I'll try to give it a full play with some friends over the weekend and see how it is in other (often larger) areas. I'm on the same driver on a 1060 (6gb).
Well the issue I am having is that I just can't get into the game at all.
And I have no idea why.
This is someone with a related issue on Windows:
https://steamcommunity.com/app/374320/discussions/0/361787186428572891/
This got solved by turning off some overlay... but obviously I am not running anything like that on linux.
First, delete all saves you have. If saves are not exactly from you'r PC, then game can reject you from play.
I'm having a very similar issue, on any proton version available in steam. The game will start fine, once it gets to the screen where the music starts and prompts to press any button, a spindle briefly appears in the top right corner indicating that it's checking save files, then a dialog box pops up saying "returning to title menu" ... There's nothing else I can do but to Alt-F4 out of the program. Any help with this would be greatly appreciated, it doesn't appear that there any saves on my machine for Dark Souls 3 so I'm not entirely sure what it's trying to check in-game, unless I'm simply not finding where the saves are on my harddrive. I'm not entirely sure if steam is bringing any of my settings down from the cloud..
Turns out I wasn't able to get passed the title menu because no configuration / save games were in my compatdata directory, once I restored my previous saves the game booted straight into the main menu, there seems to be a issue at least with Fedora 32 where the game won't get passed the title menu unless there's some kind of configuration or save file present. For any other's experiencing the same issue keep in mind that DS3 doesn't support cloud saves, so you'll have to get a save from somewhere else if you don't have one.
Nothing extracted yet.
Compatibility Report
System Information
I confirm:
steam-374320.log
Symptoms
Game loads fine, gets to the main menu, "press any button to continue" then it says "returning to title menu" and it does that every time. Example video: https://s.lolisandstuff.moe/Zse5aFPQ.mp4