On the 2026-09-15 and 2026-09-17 boots the wheel enumerated as 046D:C260
(PS3/PS4 selector in PS4 position, bound by hid-generic). The BPF udev
rule, the ensure unit and its hotplug rule all keyed on C24F, so the unit
failed once with "no G29 found" and nothing was said; 1st/3rd stayed on
the firmware's bad decode until the selector was flipped a day later.
- fixes/g29_wheel_mode.sh (new, sourced): classify the HID bus as
native/ps4/compat/absent; root-safe desktop notification via
/run/user/*/bus + sudo -u.
- --ensure: absent -> exit 0; ps4/compat -> exit 1 + critical
notification; native -> attach. --status prints the mode first.
- g29-shifter-bpf.service: Restart=on-failure, RestartSec=5min so a
notification lost before the session bus exists at boot is re-sent.
- 99-g29-shifter-ensure.rules: also fires on C260.
- tests/test_fix_g29_shifter.bats: 13 tests against a fake sysfs tree.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NVfC2T6DyvCFqse9A99zef
Live on this host since 2026-09-11 but never committed. The wheel firmware
decodes the shifter's hall sensor itself and this unit's top row rests at
Y 180-193, below the ~195 engage threshold, so 1st/3rd often did not
register. g29_shifter.bpf.c re-decodes those two gates from the raw X/Y
bytes with hysteresis (engage >= 160, release <= 140) and ORs the bit in
before hid-logitech parses the report; it never clears a bit, so the
firmware's working gates cannot regress. fix_g29_shifter.sh builds,
attaches and installs it persistently (udev-hid-bpf rule + a systemd
safety-net unit pulled in on every re-enumeration); g29_shifter_capture.py
records and grades raw captures per gate.
Two files were over the 250-line cap: the test file is split at the
record/CLI boundary with the report builders moved into a conftest fixture
(the naming hook allows only test_*.py in tests/), and the grader's
docstrings are tightened. No behaviour change to the installed fix.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SS8M5wk88nJTXxDWz61KKk
