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I have a new Ideapad 5 15 with Pop!_OS 20.04 installed.
After the installation, my touchpad wasn't working but I was able to fix that issue using the solution of @theunreal89 given here https://askubuntu.com/questions/1248176/ideapad-5-15are05-elan-touchpad-not-working-on-20-04-nor-on-18-04
Now, after some updates yesterday, it began to not work again.
I tried doing the same thing again, running

sudo systemctl daemon-reload
sudo systemctl enable --now touchpadfix.service  

as explained in the thread above. But now I am getting an error for the lines

echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/elants_i2c/unbind
echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/i2c_hid/bind

telling me there are no such devices.
Now, running the following

cat /proc/bus/input/devices

does not even show any signs of an existing touchpad anymore, so I am really lost on how to proceed.
Is there a way to troubleshoot that doesn't require kernel shenanigans?

EDIT:
Just found out that the touchpad works after booting with the power supply plugged in. But otherwise not.

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