Re: [Bug #13471] Loading parport_pc kills the keyboard if ACPI is enabled

Ozan Çağlayan
2009-08-04T11:33:02Z

Alan Cox wrote On 31-07-2009 18:17:
> There have been few changes to parport_pc but one thing recent changed
> the probe for SuperIO chips via low addresses and that could be
> interfering.
>
> commit e2434dc1c19412639dd047a4d4eff8ed0e5d0d50
> Author: Jens Rottmann <JRottmann-pZAVvlj+WpoXz/+GnIZSFIQuADTiUCJX@public.gmane.org>
> Date: Mon Jun 22 16:51:49 2009 +0100
>
> changed the behaviour slightly (hence asking about which release if it
> was a recent breakage). Its also a code area with very few changes so if
> you can find which one worked last, you should be able to transplant that
> parport_pc into 2.6.current and see if its parport or acpi triggered
> breakage.
>

I've tested on 2.6.30.4 which has apparently this commit, no changes.

I've booted into Ubuntu 8.10 which has 2.6.28. The keyboard was working
correctly eventhough parport_pc was loaded. I removed and re-probed and
the keyboard is gone.

I've set BIOS settings to default, nope.

I'll try bisecting when I find the last-good/first-bad kernel version.