I add that the kernel switch `psmouse.synaptics_intertouch=1`seems to
produce spurious middle clicks as desribed on the page
https://bugzilla.redhat.com/show_bug.cgi?id=1482640 (even though that
page says kernels >= 4.13.6 have fixed the problem).

But I find that my system may not have the latest touchpad firmware -
n23gc05w.exe - installed, even though I used WindowsToGo to run Lenovo's
auto-update utility. Someone mentioned this firmware update above as a
prerequisite for fixing the problem, so I'll install it and report back.

** Bug watch added: Red Hat Bugzilla #1482640
   https://bugzilla.redhat.com/show_bug.cgi?id=1482640

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https://bugs.launchpad.net/bugs/1791427

Title:
  Touchpad and/or trackpoint stop working after S3 suspend on Lenovo X1
  Carbon 6th

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