@AdrienM, so you can decompile your ACPI blob shipped by the device
vendor:
$ acpixtract acpi.dump
$ iasl -d *.dat
And from the decompiled `dsdt.dsl` file, it has:
Name (_HID, "XXXX0000") // _HID: Hardware ID
Name (_CID, "PNP0C50" /* HID Protocol Device (I2C bus) */) // _CID:
Compatible ID
...
I'm not sure what will it be like in the runtime, so we need your to
run:
$ cd /sys/bus/acpi/devices
$ for d in $(ls -1 */hid); do d=${d%/*}; grep -q PNP0C50 $d/modalias && echo
$d; done
And, please re-attach your dmesg log with following kernel boot
parameters. For detailed steps, please see
https://askubuntu.com/questions/19486/how-do-i-add-a-kernel-boot-
parameter:
dyndbg="file drivers/hid/* +pt" i2c-hid.debug=1 log_buf_len=16M
** Attachment added: "dsdt.dsl"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1878279/+attachment/5371900/+files/dsdt.dsl
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1878279
Title:
Touchpad not recognized on Lenovo Ideapad 5 14IIL05 81YH
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