Re: [4.12 regression] Thinkpad X250 Touchpad and Trackpoint not recognized anymore; commit e839ffa: "Input: synaptics - add support for Intertouch devices"

Looks like you running your patched kernel?

That's right.

quoted

quoted

CONFIG_RMI4_CORE=m
CONFIG_RMI4_I2C=m
CONFIG_RMI4_SPI=m
# CONFIG_RMI4_SMB is not set

This is your issue I believe.

Indeed, enabling that configuration solves that issue.

However, I think it is quite unintuitive that a module (psmouse) chooses
a default mode which requires another driver which is not necessarily
included; though it would probably be not a very clean solution to
explicitly check that as well.

Is this behaviour, that one module requires another without
communicating that clearly, wanted?

Thanks,
Pascal