Comment 76 for bug 195009

I'm a novice so if this is useful then great; if not then please ignore

My Synaptics Touchpad was working great until kernel 2.6.18 (i think) when it suddenly stopped. By doing a diff on the source code and commenting out the changes in turn, I found that I can get the Touchpad working again by commenting out the following lines of the code in the file drivers/input/serio/i8042.c.

 if (wait_for_completion_timeout(&i8042_aux_irq_delivered,
     msecs_to_jiffies(250)) == 0) {
/*
 * AUX IRQ was never delivered so we need to flush the controller to
 * get rid of the byte we put there; otherwise keyboard may not work.
 */
  i8042_flush();
  retval = -1;
 }

It seems wait_for_completion_timeout fails and therefore the retval = -1 (i.e. fail). I do not understand why this fails or what this code does but the Touchpad seems fine with commenting out these lines and I have not noticed any other problems.

P.S. I'm using AMD64