Partially applied incremental upgrades cause all kinds of trouble

Originally created by @goupille on #14754 (Redmine)

multiple users reported that after an upgrade to 3.2, the mouse and keyboard are not working anymore in the greeter

we do not have a lot of data, but, even if it looks like #13576 (closed), other hardware are affected (Acer Aspire 1410, Asus Eee PC…)

To help debugging this, see #14754 (comment 36366).

Edited May 15, 2020 by goupille

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