Comment 59 for bug 1949394

(In reply to Mateusz Jończyk from comment #53)
> Created attachment 145011 [details]
> This patch is required (together with the prev one) to test IRQ delivery on
> IRQ12
>
> The patch labeled "Try this" wasnt really efective because IRQ delivery
> testing is disabled by default on laptops.

Just FYI, that patch doesn't apply. Here's its equivalent:

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 3807c3e..53d4264 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -794,14 +794,6 @@ static int __init i8042_check_aux(void)
  * used it for a PCI card or somethig else.
  */

- if (i8042_noloop || i8042_bypass_aux_irq_test || aux_loop_broken) {
-/*
- * Without LOOP command we can't test AUX IRQ delivery. Assume the port
- * is working and hope we are right.
- */
- retval = 0;
- goto out;
- }

        if (request_irq(I8042_AUX_IRQ, i8042_aux_test_irq, IRQF_SHARED,
                        "i8042", i8042_platform_device))

Now actually compiling & testing it. Although it's been off the power cable for nearly 20 hours, when I booted it off to Linux directly this evening, Elantech trackpad didn't work. Anyway, I'll give you the acpi debug & i8042.debug activated dmesg with the above patch applied shortly.