This is tested on X1 Carbon (gen 5) pnp id: LEN0072 kernel 4.15.0 Since by default psmouse complains about "synaptics: Your touchpad (PNP: LEN0072 PNP0f13) says it can support a different bus....", I've patched the kernel to add the pnp id to smbus_pnp_ids in drivers/input/mouse/synaptics.c [1], and the trackpad seems to work at least a bit smoother (it could be placebo though). But, with the default setup, and rmi_smbus and psmouse are both compiled as modules, the trackpoint device never appears in dmesg. I can make it appear if I put rmi_smbus in /etc/modules-load.d/ so it loads before psmouse, or if I unload psmouse and load it again. I can even reproduce it by unloading both rmi_smbus and psmouse, and then only loading psmouse (psmouse seems to load rmi_smbus and switch the trackpad to it but the trackpoint is lost) Here's the output of dmesg. first part when psmouse is loaded before rmi_smbus, second when rmi_smbus is first loaded, then psmouse: [ 3720.674955] psmouse serio1: synaptics: queried max coordinates: x [..5676], y [..4760] [ 3720.707854] psmouse serio1: synaptics: queried min coordinates: x [1266..], y [1094..] [ 3720.707866] psmouse serio1: synaptics: Trying to set up SMBus access [ 3720.719392] rmi4_smbus 6-002c: registering SMbus-connected sensor [ 3720.780999] rmi4_f01 rmi4-02.fn01: found RMI device, manufacturer: Synaptics, product: TM3289-002, fw id: 2492434 [ 3720.848800] input: Synaptics TM3289-002 as /devices/rmi4-02/input/input26 <... no other messages here I just put a separator to be a bit more clear ...> [ 3755.533836] psmouse serio1: synaptics: queried max coordinates: x [..5676], y [..4760] [ 3755.565863] psmouse serio1: synaptics: queried min coordinates: x [1266..], y [1094..] [ 3755.565875] psmouse serio1: synaptics: Trying to set up SMBus access [ 3755.569661] rmi4_smbus 6-002c: registering SMbus-connected sensor [ 3755.636795] rmi4_f01 rmi4-03.fn01: found RMI device, manufacturer: Synaptics, product: TM3289-002, fw id: 2492434 [ 3755.701859] input: Synaptics TM3289-002 as /devices/rmi4-03/input/input30 [ 3755.836966] psmouse serio5: trackpoint: ALPS TrackPoint firmware: 0x01, buttons: 3/3 [ 3755.880664] input: TPPS/2 ALPS TrackPoint as /devices/rmi4-03/rmi4-03.fn03/serio5/input/input31 [ 3758.969259] psmouse serio5: TrackPoint at synaptics-rmi4-pt/serio1/input0 lost synchronization, throwing 1 bytes away. [1] https://github.com/gdamjan/linux/commit/fa6b3c893bea6d017b575438a4b367f2a7fc7717 -- damjan -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
