Comment 97 for bug 1949394

Nope, both didn't help. It was mentioned above.

The controller does not have mux. Even when the mouse is working, it does not use it.
I have made diffs of the i8042 output in both states.
Analyzed the i8042 output extensively and found not much interesting except for that:

  at 0x60,0x64 irq 1,12 //start of i8042 initialization
  d1 -> i8042 (command)
  df -> i8042 (parameter)
  ff -> i8042 (command)
  c4 <- i8042 (flush, kbd)
  20 -> i8042 (command)
  65 <- i8042 (return)
  20 -> i8042 (command)
+ fa <- i8042 (return)
+ 20 -> i8042 (command)
+ 65 <- i8042 (return)
+ 20 -> i8042 (command)
  65 <- i8042 (return)
  60 -> i8042 (command)
  74 -> i8042 (parameter)
  d3 -> i8042 (command)
  5a -> i8042 (parameter)

It happened when it worked. I have seen this only on this one log.

AUX interrupts are delivered, it was checked separately.