Force Feedback in Games

Force Feedback in Games

With the driver installed (Installation), games see a standard Linux wheel. This page explains what works out of the box, and the two per-game setups: TrueForce for SDK-aware sims, and logi-ffb for DirectInput sims.

Native Linux and most Proton sims: nothing to do

Force feedback works out of the box: the driver exposes the complete evdev effect suite (constant, spring, damper, friction, inertia, ramp, periodic, rumble). Bind your controls in game and drive.

TrueForce haptics (SDK sims under Proton)

TrueForce is the high-frequency haptic texture layer on top of normal force feedback. In the big sims it is delivered by Logitech's own signed SDK DLLs running unmodified inside Proton. Those DLLs are not redistributable, so you stage them once from any G HUB installation (a Windows machine, or G HUB unpacked into a throwaway wine prefix).

1. Stage the SDK DLLs (one time)

Four files, in Logitech's own Logi/... layout:

Logi/Trueforce/1_3_11/trueforce_sdk_x64.dll
Logi/Trueforce/1_3_11/trueforce_sdk_x86.dll
Logi/wheel_sdk/9_1_0/logi_steering_wheel_x64.dll
Logi/wheel_sdk/9_1_0/logi_steering_wheel_x86.dll

Place that Logi/ tree under whichever of these the installer finds first (highest precedence first):

• a directory you pass with --sdk-dir <path>,
• $LOGITECH_TRUEFORCE_SDK_DIR,
• the repo's sdk/ subdirectory (sdk/Logi/...) if you cloned it,
• otherwise ~/.local/share/logitech-trueforce/sdk/ (the default for package installs).

Then install them into your Steam prefixes (as your normal user, not sudo):

# from a git checkout:
./tools/install-tf-shim.sh --all-steam
# installed from a package (command is on your PATH):
logitech-trueforce-install-shim --all-steam

Games installed later: re-run that command (safe to repeat), or use --prefix /path/to/pfx for non-Steam prefixes (Heroic, Lutris). The Setup page in logi-dd-gui / logi-dd manages this per game too; see Configuring the Wheel.

2. Per-game Steam setup

For each sim, in Steam:

1. Right-click the game, Properties, Launch Options:

   PROTON_ENABLE_HIDRAW=1 %command%
   

   Required: the SDK only finds the wheel through hidraw, which Proton exposes only with this set.
2. Properties, Controller: set Disable Steam Input for this game, so the game sees the wheel directly instead of a virtual gamepad.

RS50 owners: the SDK accepts the wheel's native identity (046d:c276), so no mode switch is needed, and native mode unlocks the full 2700° range. If a particular game's SDK build does not engage TrueForce in native mode, switch the wheel to "G PRO compatibility" via its OLED menu as a fallback and please open an issue naming the game.

DirectInput sims: use logi-ffb

Some sims (Le Mans Ultimate, for example) drive force feedback through DirectInput rather than the SDK. Those games lose force feedback with PROTON_ENABLE_HIDRAW=1, because the wheel advertises no PID (force feedback) collection in its HID descriptor. Two fixes:

• Run them with PROTON_ENABLE_HIDRAW=0 (feedback routes through evdev), or
• prepend logi-ffb to the launch command:

  logi-ffb %command%
  

  This presents a virtual force-feedback wheel that catches the DirectInput effects and forwards them to the real one. The virtual wheel appears as "logi-ffb Virtual Wheel" (its own name and IDs, not the real wheel's), so a game may need a one-time manual binding to it.

logi-ffb is hardware-validated but wants more in-game testers; if you play a DirectInput sim, reports are very welcome. Design details in logi-ffb.

Games without TrueForce: simulate it

For games with no native TrueForce but with UDP telemetry output (DiRT Rally 2.0, Automobilista 2, Project CARS 2, and other Codemasters-format titles), logi-tf-sim synthesizes engine haptics from live RPM and throttle, and drives the rev LEDs to match. See Simulated TrueForce.

Verified game support

Assetto Corsa Competizione and Assetto Corsa EVO are verified end to end under Proton: steering, full force feedback, and TrueForce all at once (with PROTON_ENABLE_HIDRAW=1 and Steam Input disabled). Other Logitech-SDK sims (Le Mans Ultimate, AMS2, Assetto Corsa, rFactor 2, iRacing) share the same SDK and are expected to work; a confirmation for any of them is welcome, good or bad.

Sim	FFB path	Setting	Status
Assetto Corsa Competizione	SDK (TrueForce)	PROTON_ENABLE_HIDRAW=1, Steam Input off	✅ verified
Assetto Corsa EVO	SDK (TrueForce)	PROTON_ENABLE_HIDRAW=1, Steam Input off	✅ verified
AMS2, Assetto Corsa, rFactor 2, iRacing	SDK (TrueForce)	same recipe	🟢 expected, testers wanted
Le Mans Ultimate and other DirectInput sims	DirectInput	PROTON_ENABLE_HIDRAW=0, or logi-ffb %command%	🟡 needs testers
Native Linux games	evdev	none	✅ works out of the box

A couple of game-side behaviors to know about (the rotation-range reset at session start, and keeping hands clear during AC EVO map loads) are covered in Troubleshooting.