Comment 65 for bug 1238194

I encountered this issue while using a "Lenovo ThinkPad Compact USB" keyboard with 3.19.0-33-generic. For this keyboard and most likely many recent Lenovo Thinkpads the correct module that needs to be added to /etc/initramfs-tools/modules is "hid-lenovo". Executing "update-initramfs -u -k all" after the addition will update the initramfs of all installed kernels, not only the currently used one. Some older kernels (at least 3.13.0-nn-generic) may require "hid-lenovo-tpkbd" instead as the module appear to have been renamed at some point.