Thinkpad T540p, same as comment #86: reloading psmouse fixes the problem until next suspend, setting psmouse.synaptics_intertouch=0 fixes it for good.
Extra note: i2c_i801 isn't blacklisted, but does not load by itself either. Having it loaded (including before psmouse) seems to have no effect on multitouch getting messed up on resume.
Thinkpad T540p, same as comment #86: reloading psmouse fixes the problem until next suspend, setting psmouse. synaptics_ intertouch= 0 fixes it for good.
Extra note: i2c_i801 isn't blacklisted, but does not load by itself either. Having it loaded (including before psmouse) seems to have no effect on multitouch getting messed up on resume.