This looks very strange. "Mouse emulation mode" is in native psmouse in kernel 3.19. If you replace it with mine, it has no such text in the source. Maybe there is some feature I do not understand, which restores the original module.
BTW Ubuntu 14.04 with 3.19 kernel has no this issue at all. It boots with dkms module.
@brott,
This looks very strange. "Mouse emulation mode" is in native psmouse in kernel 3.19. If you replace it with mine, it has no such text in the source. Maybe there is some feature I do not understand, which restores the original module.
BTW Ubuntu 14.04 with 3.19 kernel has no this issue at all. It boots with dkms module.