this post was submitted on 04 Jul 2025
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Steam Deck

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FIXED: I'm playing a game I press a button and suddenly there's a series of random inputs that move my character.

It's every game I play so must be a default somewhere but I can't find it.

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[–] MrNesser@lemmy.world 1 points 3 days ago

I suddenly feel so dumb and vindicated at the same time.

I'm using a easy smx controller which form some reason was connecting in Nintendo switch mode to the deck.

Removing and switching the mode to Xbox controller fixed the whole thing, I also wiped any programming just in case.

Why do I feel vindicated?

I kept the instruction booklet.

[–] Pyro@programming.dev 4 points 1 week ago* (last edited 1 week ago)

On steam deck and controller, you can map a button to send a combination or sequence of inputs to the game.

Maybe you accidentally added one of those mappings on your default controller configuration? Check your controller config carefully or reset it.

[–] Dariusmiles2123@sh.itjust.works 4 points 1 week ago (1 children)

I’ve had something like this on a Playstation 3 controller a while ago.

It was a problem with some foam which got thinner with age and a contact patch.

I don’t know if the same thing could apply to a few years old Steam Deck, but the symptoms were exactly the same.

[–] MrNesser@lemmy.world 3 points 1 week ago (2 children)

Iv had it happen on the deck controls and 2 Bluetooth controllers so it seems system related

Well that’s good news and you could maybe just reinstall everything if you don’t find another easier solution.

[–] GreyEyedGhost@lemmy.ca 1 points 1 week ago (1 children)

Check your keybindings for that game, and globally. Did you hook up macro that would do this? Was it for this game? Was it for a different game, but you set it up globally by accident?

[–] MrNesser@lemmy.world 1 points 1 week ago (1 children)

It's every game Not sure where I can find global key bindings

[–] GreyEyedGhost@lemmy.ca 1 points 1 week ago

Hit the Steam button, go to Settings, then Controller. Go to the Non-Game Controller Layouts, do Edit or click the gear icon and do Reset.

If that doesn't help then I'm not sure of the cause.

[–] rotopenguin@infosec.pub 4 points 1 week ago* (last edited 1 week ago)

Steam should be loading a separate controller config for every game, or at very least loading a default profile of "every button is literally the same as on an Xbox controller". A weird SteamInput config shouldn't affect across all games, I think.

Does it act up in Desktop mode? How about if Steam is closed, and you play something from Heroic?

It's possible that a hardware fault is sending insane inputs. Bad connections to the controller-sub-boards? The controller microchip just going batty?

[–] Fubarberry@sopuli.xyz 1 points 1 week ago* (last edited 1 week ago) (1 children)

Sounds really weird. Do you have any deck plugins installed? Does it happen when browsing steamOS menus/desktop mode?

I wonder if it could just be an issue with the default controller with joystick trackpad control config, that might have it affect most of your games. Might try specifically using a different config in some games and see if that changes anything.

[–] MrNesser@lemmy.world 2 points 1 week ago (1 children)

No that I know of I tried it on the diagnostic screen apparently it's the left bumper button l4 and it's pressing select up up left left down down right.

So it's almost like a macro running.

[–] bjoern_tantau@swg-empire.de 1 points 4 days ago

Damn, that looks like a Konami code. Did you play any Konami games? Maybe it had some key bindings for that and they got stuck for some reason.