Comment 19 for bug 1849721

The L390 in our lab doesn't have this issue.

So please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4-rc7/

Particularly this commit:
commit 43b7029f475e7497da1de1f4a1742241812bf266
Author: Hans de Goede <email address hidden>
Date: Sun Oct 20 23:47:18 2019 +0200

    HID: i2c-hid: Send power-on command after reset