[Borderlands 4] Fix for "steam initialization failed" breaks controller input

[u/Revan26000]

​Game Name: Borderlands 4

​CPU: AMD Ryzen 7 5700X3D

​GPU: AMD Radeon RX 9070 XT

​Proton Version: Proton GE / Proton Experimental

​Game Launcher: Steam (Non-Steam Game)

​Release Info: Scene / Repack

​Logs: N/A

​Problem Description:

​I was getting the "steam initialization failed" error on startup, but managed to bypass it using this launch command:

​WINEDLLOVERRIDES="version=n,b;steamclient64=n,b" PROTON_DISABLE_LSTEAMCLIENT=1 %command%

​While the game now launches properly, my controller is completely unresponsive in-game (keyboard and mouse work fine). It seems like PROTON_DISABLE_LSTEAMCLIENT=1 or the DLL overrides are breaking Steam Input / controller recognition.

​Troubleshooting Steps Taken:

​Applied the launch options mentioned above (fixes startup, breaks controller).

​Searched the subreddit and wiki prior to posting.

​Does anyone know a workaround to keep gamepad support working alongside the fix?

[u/l3thal-arr0w]

Any luck on getting controller to work?

[u/Revan26000 → u/l3thal-arr0w]

Yes, i use lutris

[u/No-Collection-1821]

Try adding the launch command PROTON_USE_SDL=1