Shaky mouse behaviour when using gear/emote wheel since the latest patch - am I the only one? - UPDATE - WORKAROUND

See video attached (if I managed to upload it) - I'm making slow, smooth, regular circles.

I have obviously submitted a ticket already, I've been just wondering if the issue is global, or it's just me (and a few other people) because

• I'm using Linux
• I'm using an AMD GPU/CPU (...somehow?)
• the Steam update window stopped at 0%, so I restarted the whole thing and downloaded it again (but it must not be the reason, since I have also identified game file integrity after that)
• fuck me and my bad luck

It's probably unrelated, but since the latest patch (from ~2 days ago) I've been unable to delete the new Embark message in my inbox (top right corner in Speranza).

There is also another bug where the weapon upgrade click (from my inventory) takes me to the gunsmith bench, but with a completely different weapon in focus, also totally scrambling the weapon inventory, so first I have to rummage through 30 weapons to find the one in my hand - but that has been the case since the preceding patch.

This wheel thing is so frustrating that I just stopped playing altogether. I almost lost some valuable gear because I switched to the wrong item in a sticky situation, and I wouldn't want to go there again. It's like the mouse has an epileptic shock every time I move it while the wheel is up. Sometimes I try to pick the item in the bottom left, and after ~12 shakes in half a second it settles in the top section. Even when I'm doing very slow, steady circles it ends up crazy bouncing everywhere.

So what I had tried already:

• Restarting Steam or the entire PC
• Closing every single program I would normally use
• Changing compatibility mode: only works once, see below, in the update section
• Deleting Steam Overlay cache; disabling Steam overlay
• Deleting shader cache (it should have nothing to do with shaders at all, but see below, in the update section)
• Every single fucking combination of quitting Steam, starting the game immediately with the desktop icon, starting Steam first - then the game from the library button, all these done after either of the changes above
• Verifying integrity of game files

--- UPDATE ---

First I thought I found the root cause. As it turns out, on Monday, when the patch came out (or at least when I found out about it), there was also a Proton Hotfix update in Steam which I missed first. So I downloaded it, but it was still the same. THEN I quit Steam, restarted it and voilá, I got back my smooth cursor!

...Only to run into the exact same shaky cursor (again: only in the emote wheel, nowhere else in the game or any other program). I started to fiddle with things again, and what seemed to be working was to change the compatibility mode to Proton Experimental, and then quitting Steam (running the game straight after the compatibility change would still lead to the same shaky wheel cursor!), and starting it again.

HOWEVER, as it later turned out, it's like every single compatibility mode got corrupted, because after starting the game again (either by staying within Steam OR quitting it, then starting again) the bug returned, often switching to a completely different section of the wheel when I was about to release the button, often leading into unfavourable or straight inescapable situations.

What I noticed is that whenever I changed compatibility mode first, the game re-calculated Vulcan shaders. Shaders are responsible for visuals, so in theory they should have nothing to do with this, but I was rather desperate at this point. So I was thinking it could have something to do with the shader cache. Emptying it and re-running the game didn't help. Or maybe the Steam overlay? Nope, deleting the overlay cache or entirely disabling it didn't help, either.

--- UPDATE 2, workaround ---

I think I'm getting close. I found a workaround (not a fix), but this is still a rather inconvenient bug.

I managed to boil it down to one key aspect: Steam Linux Runtime 4 AND Firefox. Again: these issues started this Monday (20/04/2026). I never had this problem with the game before while Firefox was running just the same. What I managed to investigate/deduce this far:

• Running Firefox while Steam is open will somehow corrupt the game and the issues will persist even after closing Firefox. Or restarting Steam. Or restarting the entire PC. Or asking Jesus to take the wheel.
• Once the game gets corrupted, it can be reset by closing FF, deleting the game executable (Steam/steamapps/common/Arc Raiders/PioneerGame.exe), then verifying integrity of game cache files. Then Steam will proceed to download/update files for 3 things: Arc Raiders, Steam Linux Runtime 4, and Proton Experimental (I guess it's Proton Hotfix if I set that as default in Steam or the game). Then closing Steam and opening it again should result in a smooth wheel UI experience (until the next time you foolishly start FF while Steam is running).
• I need to test it more, but the corruption seems to be able to fix by having a "clean"/uncorrupted copy of the Linux Runtime 4 directory (/home/username/.local/share/Steam/steamapps/common/SteamLinuxRuntime_4) and simply sudo pasting it back if the user accidentally starts Firefox while Steam is running.

Whether the corruption in Steam Linux Runtime 4 is caused by Steam Linux Runtime 4, Steam, Arc Raiders, Proton or Firefox (??), I'm still not sure. However, the only overlap I can think of between Steam and FF is the default Steam browser, which is Firefox at the moment. Either way, changing the default browser would still just be a workaround, but this is how far I got after wasting most of my day on running and quitting the game countless times.

I doubt it's one of the extensions, but for the sake of clarity, here are the ones I'm using (I have tested for the latest addition, Per-Tab Volume Control: it's not the one causing the issue): ClearURLs Indie Wiki Buddy News Feed Eradicator Old Reddit Redirect Per-Tab Volume Control Simple Translate SponsorBlock for YouTube - Skip Sponsorhips uBlock Origin Youtube-shorts block

MoBo: Gigabyte B550 AORUS ELITE AX V2 OS: Linux Mint 22.3 - Cinnamon 64-bit Linux Kernel: 6.8.0-110-generic CPU: AMD Ryzen 5 3600X 6-Core Processor × 6 GPU: Advanced Micro Devices, Inc. [AMD/ATI] Navi 32 [Radeon RX 7700 XT / 7800 XT] (7800XT, according to the box) RAM: 16GB DE: Cinnamon 6.6.7 Display Server: X11

Mozilla Firefox for Linux Mint mint-001 - 1.0 150.0 (64-bit)