Also have issues with the touchpad of my thinkbook. Do you also receive the failed to load #IRQ27 at boot?
If so, it’s related to this bugreport:
Haven’t seen it fixed yet, but there is a workaround to get it working again:
sudo nano /usr/lib/initcpio/install/block
comment out the /drivers/mfd/ line, so it looks like this
# add_checked_modules '/drivers/mfd/'
finalize with, if no errors, reboot and check
sudo mkinitcpio -P