What controller are you using with the Deck?
My pick after searching around is the 8BitDo Ultimate C (link) which is the cheaper version of the ultimate with no dock. So far, it’s been working well for me. I just had to restart the Deck the first time after the pairing, since then, it recognize the device all the time.
Post your model below
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What I cannot recommend is the Xbox One S controller because the bluetooth latency is absolutely terrible for anything that isn’t turn-based combat and even then navigating menus is still sluggish unless you are using the official MS wireless adapter. That requires a separate kernel module which you have to re-install every time there’s a SteamOS version update.
Was this resolved on the OLED model? I heard it has improved BT latency.
I have 3 of these and never an issue with BT connectivity or latency on the steam deck (non-oled model). Strange. I’ve never used the wireless adapter on the steam deck, so I can’t say anything about that.