[1.0.3-rc3] [Linux] Input causes lag spikes after leaving game open for too long | Shapez 2 | Page 1

harsh tartan May 24, 2026, 10:39 AM

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It seems when leaving the game open for too long (haven't timed how long yet, I just know this doesn't seem to happen upon short play sessions) any input from the mouse/keyboard causes lag spikes. When not touching anything it runs fine, and restarting the game fixes it.
This doesn't happen with any of my other games and my system seems fine (thermals are all good, nothings being overworked), so I'm guessing this is something caused by Shapez 2 and not my system.

Attached;

A video of the problem in action (with all the debug charts open so you can see it better)
Player.log from the session the video was taken from
My save file
The output of debug.sysinfo and what my Graphics settings are.

Linux setup in-case that's relevant; Arch Linux on Kernel 7.0.3-arch1-2 under Niri (Wayland Compositor)
Steam launch args gamescope -w 2560 -h 1440 -r 240 -- %command% (from ProtonDB, apparently that's what lets it run under Wayland?)

Thanks for any help! If I've missed something just let me know

📎 Player.log 📎 backup-v84-2026-5-24--11-32-26--5669800.spz2

gusty sinewBOT May 24, 2026, 10:39 AM

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Thank you for reporting this bug! Our team will review your report soon.
Feel free to add more details in follow-up messages — we're also scanning for duplicate reports automatically now.
📨 There are currently 35 reports awaiting team review. Due to the high volume, it may take a little longer for us to get to yours.
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gusty sinewBOT May 24, 2026, 10:39 AM

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harsh tartan It seems when leaving the game open for too long (haven't timed how long yet, I ...

📋 Log File Analysis

Thanks for attaching your log file — no errors have been found at a first glance.

gusty sinewBOT May 24, 2026, 10:39 AM

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harsh tartan It seems when leaving the game open for too long (haven't timed how long yet, I ...

💾 Untitled Savegame

Started in

1.0.3-rc3

Last played in

1.0.3-rc3

Scenario

Classic - Regular

Seed

52140

Research

26%

Buildings

17,018

Completed

No

sudden notch May 25, 2026, 12:43 PM

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harsh tartan It seems when leaving the game open for too long (haven't timed how long yet, I ...

Thanks for reporting this issue.
Can you turn off gamescope and see if that fixes the issue?

harsh tartan May 25, 2026, 12:44 PM

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I can but can I ask how your meant to run the game under Wayland then? Cus it just seems to crash instantly upon launching when it's off

gusty sinewBOT May 25, 2026, 12:45 PM

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✅ Thank you for providing further information, our team will have a look again!

sudden notch May 25, 2026, 12:58 PM

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Try this:
It will hopefully allow the game to be opened in windowed mode.
But be warned, once you get in and try to change it back to full screen it will most likely crash again. It does seem to work sometimes if the fullscreen is less than native.
Locate this folder: ~/.config/unity3d/tobspr Games/shapez 2/
Place the prefs file within that folder
Place Display.json within the Local folder.

📎 Display.json 📎 prefs

harsh tartan May 25, 2026, 2:09 PM

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Still immediete crashes unfortunately

sudden notch May 25, 2026, 2:10 PM

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harsh tartan Still immediete crashes unfortunately

Does it show it trying to go to full screen?

harsh tartan May 25, 2026, 2:10 PM

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No, looks like it starts in Windowed

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thank you discord

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there

sudden notch May 25, 2026, 2:11 PM

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Wow. that is quick on its decision to not start 🙁

harsh tartan May 25, 2026, 2:12 PM

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o, got a crash in Player.log actually

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📎 Player.log

gusty sinewBOT May 25, 2026, 2:12 PM

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harsh tartan

📋 Log File Analysis

Log Analysis (Player.log):

Fatal Runtime Error: A fatal error occurred in the Mono runtime or one of the native libraries, with native fault reporting also failing, leaving some diagnostic information unavailable.

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sudden notch May 25, 2026, 2:16 PM

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It's detecting vulkan 2 times at the beginning. No idea what that means.

harsh tartan May 25, 2026, 2:17 PM

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I technically have my dedicated GPU and an APU in my cpu, could be probing for vulkan support on both?

sudden notch May 25, 2026, 2:17 PM

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It does it with the first log file with gamescope as well

sudden notch May 25, 2026, 2:18 PM

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harsh tartan I technically have my dedicated GPU and an APU in my cpu, could be probing for v...

Maybe.

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I will test on ubuntu on my system that can see if the same thing happens.

harsh tartan May 25, 2026, 2:19 PM

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Cool, if it doesn't maybe an arch thing then

sudden notch May 25, 2026, 2:44 PM

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harsh tartan Cool, if it doesn't maybe an arch thing then

It's happening on my system as well and its showing both the integrated graphics + my rx6600 without any crashing.
The next thing that should happen in your log file is applying graphics settings.
Can you tell me the folder you put Display.json into? That is the file that it applies.

harsh tartan May 25, 2026, 2:45 PM

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~/.config/unity3d/tobspr Games/shapez 2/Local

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sudden notch May 25, 2026, 2:56 PM

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harsh tartan

That totally should have worked 🙁
Then it might be an arch thing as you have said.
It doesn't work with proton?

harsh tartan May 25, 2026, 2:57 PM

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I'll go quickly test with Proton, as well as a different compositor first in-case it's Niri causing issues

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Alright, it launches on KDE

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So it's the Niri WM i'm using

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Strange, no idea why Shapez would care about that

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And yeah Proton was fine on Niri

sudden notch May 25, 2026, 3:23 PM

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harsh tartan And yeah Proton was fine on Niri

That is good at least.

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looks up Niri WM

harsh tartan May 25, 2026, 3:24 PM

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Lmao, yeah if you don't want to deal with that I'm happy to just run it as proton and call it there cus I know you have better things to be doing than debugging a WM that almost nobody else probably uses

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Just tried Jazzpunk (another unity game with native linux builds, although older engine version) and it runs fine so not sure what's happening with shapez specifically

sudden notch May 25, 2026, 3:24 PM

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I wish it was just that simple.
A lot of people are having issues with Linux and AMD GPUs currently.

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And Shapez 2

harsh tartan May 25, 2026, 3:24 PM

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Strange

sudden notch May 25, 2026, 3:25 PM

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It's a problem with the version of unity the game uses. I am not sure of the exact specifics.

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The moment I swapped the rx6600 with a RTX5060 on ubuntu the problems just ceased.

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And now the RTX5060 is in its box because its nice to have the problem being reproducible for possible work arounds etc.

harsh tartan May 25, 2026, 3:30 PM

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What Unity version is it? I've still got Unity Hub installed so can screw around with it to try to see if I can find whats causing it at least for you

sudden notch May 25, 2026, 3:33 PM

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harsh tartan What Unity version is it? I've still got Unity Hub installed so can screw around...

2022.3.62f2
I recommend doing a web search about it to see what the exact details are.
If it was an easy fix, we would have done it.

harsh tartan May 25, 2026, 3:35 PM

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Oh yeah I would imagine, for the record this is most likely just Unity's problem and not yours, just curious if I can find a workaround or something

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Thanks

sudden notch May 25, 2026, 3:43 PM

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Thanks for being understanding 🙂

harsh tartan May 25, 2026, 3:55 PM

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Just made an empty project and built it, same error it would seem. What's interesting is when I force OpenGL it runs fine, only when I make the graphics API Vulkan does it die

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Does Shapez let you change the graphics API on linux native or is it always forced to Vulkan?

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Yeah. Shapez native runs with the -force-glcore flag just fine

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So something with Unity's Vulkan impl is the issue

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Rendering issues with some stuff but tbf if you guys don't support it that's expected

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Enabling srgb write mode fixes Vulkan for my little unity project, can't test this on Shapez obviously myself so you'll have to fill me in there

sudden notch May 25, 2026, 4:07 PM

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What exactly does that do?

harsh tartan May 25, 2026, 4:08 PM

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thats what Unity says, in truth graphics api stuff is a weak point for me so can't comment that much on it

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not even sure what the alternative to srgb color space unity would be trying without it

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Ah, of course... that method doesn't exist in their docs lol

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Closest I can find is https://docs.unity3d.com/2022.3/Documentation/ScriptReference/PlayerSettings-vulkanEnableSetSRGBWrite.html

sudden notch May 25, 2026, 4:19 PM

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harsh tartan Ah, of course... that method doesn't exist in their docs lol

Doesn't mean I am not going to test it anyway.

harsh tartan May 25, 2026, 4:20 PM

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True

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Just tried it on KDE again to see if it fixes the fullscreen/tabbing out issues that were linked and so far it looks fine yep - -force-glcore and the game's perfectly happy lol

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Without it it'll crash either upon the loading bar starting or upon tabbing out

sudden notch May 25, 2026, 4:34 PM

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Its running in opengl when that is set. Unless I messed with something I shouldn't have.

harsh tartan May 25, 2026, 4:34 PM

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As in when it's first loading or?

sudden notch May 25, 2026, 4:36 PM

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harsh tartan May 25, 2026, 4:36 PM

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Oh

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Wait

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What?

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So the game uses OpenGL fully

sudden notch May 25, 2026, 4:37 PM

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Badly but yeah.

harsh tartan May 25, 2026, 4:37 PM

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Why does it log out vulkan stuff then lmfao

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I thought it was in Vulkan the entire time

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In that case I'm even more confused as to why that launch arg fixes it

sudden notch May 25, 2026, 4:38 PM

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Do you know for sure your mini test was running in vulkan, and not opengl?

harsh tartan May 25, 2026, 4:40 PM

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100%

sudden notch May 25, 2026, 4:41 PM

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I might be doing something wrong. I don't usually mess around with anything like this.

harsh tartan May 25, 2026, 4:42 PM

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Wait, nevermind I misunderstood you - Yeah your fine
I thought you meant shapez uses OpenGL anyways, regardless of that launch flag - I now realize you meant when that flag is set only otherwise it goes into Vulkan

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Yeah nah in that case your right, that flag forces it into OpenGL yeah

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And removing it should make the game go back to vulkan and crash

sudden notch May 25, 2026, 4:43 PM

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Trying something else.

sudden notch May 25, 2026, 5:08 PM

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Got it running with vulkan with SRGB Write Mode is on, but it's still crashing.

harsh tartan May 25, 2026, 5:08 PM

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Same stack trace?

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With the weird internal mono error

sudden notch May 25, 2026, 5:14 PM

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harsh tartan May 25, 2026, 5:14 PM

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Yeah seems to be

sudden notch May 25, 2026, 5:19 PM

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Well, it was an interesting experiment 😉

harsh tartan May 25, 2026, 5:20 PM

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Let me try something with my project

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So its crashing with the fullscreen thing ye?

sudden notch May 25, 2026, 5:21 PM

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It appears to work if the resolution is less than native, but still fullscreen

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or borderless

harsh tartan May 25, 2026, 5:22 PM

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Yup, again Unity bug

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Little test game does the same - Exclusive fullscreen crashes but fullscreen windowed doesn't

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Now the question is why 🤔

sudden notch May 25, 2026, 5:24 PM

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Yeah 🙁

harsh tartan May 25, 2026, 5:24 PM

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Try enabling "Aquire Swapchain image as late as possible"

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Literally two options below SRGB Write

sudden notch May 25, 2026, 5:25 PM

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Not right now. Work actually finished a few hours ago. I need a break 😛

harsh tartan May 25, 2026, 5:25 PM

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That fixes it for me lmao, it seems the key is to keep pressing random checkboxes until it works

harsh tartan May 25, 2026, 5:25 PM

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sudden notch Not right now. Work actually finished a few hours ago. I need a break 😛

Oh right, all good then :D

sudden notch May 25, 2026, 5:26 PM

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Give me a screenshot of what it looks like for when I test it?

harsh tartan May 25, 2026, 5:26 PM

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the one in blue

sudden notch May 25, 2026, 5:26 PM

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What does your linux API options look like?

harsh tartan May 25, 2026, 5:26 PM

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Not sure why swapchain would have any effect either unless its just getting it too early while trying to fullscreen the application but thats unity for ya

harsh tartan May 25, 2026, 5:27 PM

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sudden notch What does your linux API options look like?

Still just Vulkan

sudden notch May 25, 2026, 5:28 PM

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Before mine was set to auto and had Vulkan + opengl as options after I turned it off.
And I think it defaulted to opengl

harsh tartan May 25, 2026, 5:28 PM

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That was mine too, just the default

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I manually removed OpenGL so I knew it would be going into vulkan and not backing up to gl

sudden notch May 26, 2026, 3:59 PM

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harsh tartan the one in blue

Thanks for bringing this up as a possible fix/improvement to the crashing issues.
It does have potential, but it will need a lot of testing to see if its going to work for most players affected, and not create other issues at the same time.

sudden notch Jun 2, 2026, 8:50 AM

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@harsh tartan Can you try one more thing for your initial issue with your original settings? Turn off vsync?

harsh tartan Jun 2, 2026, 1:59 PM

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sudden notch <@492040754743476239> Can you try one more thing for your initial issue with you...

Will try it out when I'm next in the game and let you know

gusty sinewBOT Jun 2, 2026, 1:59 PM

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✅ Thank you for providing further information, our team will have a look again!

#[1.0.3-rc3] [Linux] Input causes lag spikes after leaving game open for too long