Comment 32 for bug 1874374

I have a similar issue with my Thinkbook 14 IIL.

There's no "_HIDELAN0634" record in the ACPI though, just "ELAN0634".

Applying the patch manually didn't help, but I probably did something wrong in the process (downloaded kernel source, added the missing ID to the driver file, compiled it, applied with insmod = no effect).

I can provide some additional info, if it would be useful, and try the ppa:vicamo/ppa-1861610. if someone could explain how to work with it (adding the PPA and running sudo apt-get update didn't install anything new). The laptop runs Kubuntu 20.04, 5.4.0-28. The touchpad worked fine under Windows after installing Lenovo's serial IO driver.