For Robin (brobert420), who in comment #69:

> Commenting out blacklist i2c_i801 did end with mouse not working at all after 
> wakeup […]. I got an L440. Ubuntu 18.04 4.19rc1

I had the same problem with a ThinkPad T440s on Ubuntu 19.10 beta. (Just
that there was no blacklist entry in /etc/modprobe.d/blacklist.conf so I
used "modprobe i2c_i801" instead.)

However, when I instead use the module name with a "-" instead of "_":

    modprobe i2c-i801

then it works immediately to restore two-finger scrolling, and two-
finger scrolling keeps working after a suspend-and-resume cycle.

In other news, this bug is still present in Ubuntu 19.10.

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https://bugs.launchpad.net/bugs/1722478

Title:
  Two-finger scrolling no longer works after resuming from suspend

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