Comment # 16 on bug 954532 from Takashi Iwai

Thanks for comprehensive tests.  So, yeah, this looks more like an ACPI-related
issue.  Normally, this device should have been enabled via HID driver.  But it
failed due to some reason, as found repeatedly:

 i2c_hid i2c-ELAN0501:00: Failed to get GPIO interrupt
 i2c_hid i2c-INT33D1:00: Failed to get GPIO interrupt

It implies that the GPIO description assigned to this device via ACPI doesn't
exist or is wrong.

Jiri, do you have any clue?

In anyway, I suppose this should be reported rather to upstream, as it's a
problem seen in the latest upstream.