Managed to get the touchpad operate on 15-IML applying the following: Initially touchpad didn't operate at all under Linux.
0) UEFI firmware update to CJCN24WW revision (https://pcsupport.lenovo.com/ru/ru/products/laptops-and-netbooks /thinkbook-series/thinkbook-15-iml/downloads/driver- list/component?name=BIOS) Result: touch pad becomes operational, but no extra functions (multi- touch scrolling, etc) available. 1) Kernel 5.4.15 + patch (https://lkml.org/lkml/2019/12/1/179) Result: no change, as elan_i2c driver doesn't detect the device and is not loaded 2) ACPI DSDT table patching (renaming XXXX0000 -> ELAN062F), https://github.com/realnickel/lenovo_thinkbook_iml15_touchpad_acpi_fix/commit/de0ca637f7d8de2164c787801b4af9d4ff586d67 Result: elan_i2c driver detects the hardware, full functional. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1853277 Title: Lenovo ThinkBook 14-IML Touchpad not showing up in /proc/bus/input/devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853277/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
