Bjorn Helgaas wrote:
> Thanks very much for the report.  This sounds like it could be a
> PNPACPI issue, which I am very interested in fixing.
>
> Can you please turn on CONFIG_PNP_DEBUG in your .config and collect
> the complete dmesg log with and without "pnpacpi=off"?
>
> I do have an "lspnp" that works with PNPACPI here:
>   http://kernel.org/pub/linux/kernel/people/helgaas/pnputils-0.1.tar.bz2
> but it's not widely used.  The debug information from the config
> option above is usually more useful.
>
> Bjorn

I'm sorry it took me so long, here's the output of lspnp -vvv from both 
PNPBIOS and ACPI PnP (same kernel, the only difference is pnpacpi=off 
boot argument). I can't find any mention of my parallel port in ACPI PnP 
output but it's the last listed device (00:15 PNP0400) in PNPBIOS output.

Regards,
Martin Doucha