Comment # 1 on bug 1062168 from Jiri Slaby

One of the differences is the peaq_wmi driver in 4.14:
input: PEAQ WMI hotkeys as /devices/virtual/input/input8

Could you blacklist (/etc/modprobe.d/50-blacklist.conf) or delete (see modinfo
peaq-wmi, where it is) it and recreate initrd to be sure?