Further investigation reveals that this only occurs when S3 suspend is
enabled in BiOS. The default that is shipped is identified as s2idle in
systemd (just called "Windows 10 and Linux" in BiOS[1]) and is a sort of
software suspend that does not preserve much battery time (which is also
why I switched to S3). S3 is suspend to RAM I think.

I have upgraded to a new BiOS release that was made available today
(N32ET68W 1.44), and an update to the Embed Controller. This did not
help with the issue unfortunately.

Seeing as the touchpad works fine with the software suspend, but not the
S3 RAM suspend, is there perhaps some module that is not handled
correctly when waking up from a more thorough suspend?

[1] https://i.imgur.com/7ddEvpW.jpg

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https://bugs.launchpad.net/bugs/1938096

Title:
  [Lenovo X1 Carbon 9th] [SYNA8009:00 06CB:CE57] touchpad lagging after
  resume from suspend

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