Ubuntu
linux package

  1. Bug #1752437
  2. Comment #26

Comment 26 for bug 1752437

Revision history for this message
In , openproggerfreak (openproggerfreak-linux-kernel-bugs) wrote :

Created attachment 275381
possible fix for touchscreen

I think I found the problem.
There are 2 ACPI-related bugs which prevents the detection of the touchscreen.

1. As already mentioned, the AMD GPIO driver tries to get an IRQ for GPIO but the ACPI code is missing for x86.
2. The IRQ of the GPIO device is misconfigured. For some reason it sets the IRQ "edge, high" but in the ACPI table it's defined as "level, low".

I made a fix but it's only a temporary workround until someone who have more knowledge of the subsystems can implement it cleaner.
Could someone try this patch on a desktop enviroment? I just tested the output of hidraw which worked.