Comment 4 for bug 1798583

The issue is at stated, the hid steam driver in Kernel 4.18.

There is a patch available here from the creator of the driver to fix it: https://lkml.org/lkml/2018/10/14/502

I don't know if that's included in any Kernel builds yet, users commenting here: https://github.com/ValveSoftware/steam-for-linux/issues/5645#issuecomment-429799484 note that the patch does fix it, so it would be good if Ubuntu could pull the patch in.