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https://github.com/kuhyx/testsAndMisc.git
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Krzysztof kuhy Rudnicki
c81e4a9446
BeamNG.drive 0.39 native lost G29 FFB because SDL3's HIDAPI lg4ff driver advertises an effect-status query it cannot answer (12,201 failures per session in beamng.log). DOCS-g29-ffb.md records the diagnosis, the narrow SDL_JOYSTICK_HIDAPI_LG4FF=0 hint vs the broad one, and the launch-option %command% bug that had gamemoderun passed as a game argument. install_new_lg4ff.sh swaps the in-tree hid-logitech for new-lg4ff via DKMS (dkms.conf installs it under the same name in updates/dkms/), regenerates initramfs presets that bundle the module, and offers --status/--revert. Passed install/status/revert in vmbox; host run pending. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SS8M5wk88nJTXxDWz61KKk
43 lines
2.5 KiB
JSON
43 lines
2.5 KiB
JSON
{
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"intent": "Restore G29 force feedback in BeamNG.drive native Linux and give the wheel an installable/revertible new-lg4ff driver upgrade.",
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"scope": [
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"linux_configuration/fixes/install_new_lg4ff.sh (new)",
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"linux_configuration/docs/DOCS-g29-ffb.md (new), docs/DOCS-g29-shifter.md (cross-link)",
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"The SDL env var itself lives in steam-backlog-enforcer (_desktop_env.py, commit 0f5d234) and in the BeamNG Steam launch options; not in this repo"
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],
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"changes": [
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"install_new_lg4ff.sh: installs new-lg4ff-dkms-git from AUR, verifies dkms placed hid-logitech under updates/dkms/, regenerates initramfs presets that bundle hid-logitech, reloads the module when the wheel is present; --status and --revert (pacman -Rns + depmod + reload)",
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"DOCS-g29-ffb.md: the SDL3 hidapi lg4ff diagnosis (12,201 'Failed to get joystick3 FFB effect status' lines), narrow vs broad SDL hint, the missing %command% launch-option bug, new-lg4ff traps"
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],
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"verification": [
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{
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"command": "grep -c 'FFB effect status' ~/.local/share/BeamNG/BeamNG.drive/current/beamng.log (after relaunch with SDL_JOYSTICK_HIDAPI_LG4FF=0)",
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"result": "pass",
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"evidence": "0 (was 12201); haptic feature line 'Constant' (kernel path); user confirmed force + self-centring in a car"
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},
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{
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"command": "python3 /tmp/g29_ff_probe.py (evdev FF_CONSTANT +/-0x7fff, 2 s each)",
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"result": "pass",
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"evidence": "user: 'it moved all the way to the left and to the right' - kernel driver drives the motor"
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},
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{
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"command": "vmbox lg4ff: makepkg new-lg4ff-dkms-git; install_new_lg4ff.sh; --status; --revert",
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"result": "pass",
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"evidence": "install rc=0 (module file updates/dkms/hid-logitech.ko.zst), status rc=0, revert rc=0 (module file back to kernel/drivers/hid/, package removed). Passed in vmbox only; host run pending"
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},
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{
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"command": "shellcheck linux_configuration/fixes/install_new_lg4ff.sh; pre-commit run --files <changed>",
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"result": "pass",
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"evidence": "shellcheck clean; all hooks Passed"
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}
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],
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"risks": [
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"Host initramfs bundles hid-logitech (autodetect); the script regenerates all presets with mkinitcpio -P, which touches /boot",
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"modprobe -r hid_logitech while a game holds the evdev node drops that handle; run with games closed"
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],
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"rollback": [
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"install_new_lg4ff.sh --revert (pacman -Rns new-lg4ff-dkms-git, depmod, mkinitcpio -P, module reload)",
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"Validate: --status shows module file under kernel/drivers/hid/ and ff caps 300040000 0"
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]
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}
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