psm0 broken with acpi_ibm on 6.0-RELEASE

[Brian Buchanan]

On Tue, 8 Nov 2005, Petr Holub wrote:

> I've found the following problem on my IBM T41p when running 6.0-RELEASE:
> when both psm and acpi_ibm are compiled in the kernel, the psm0 device
> (touchpad) doesn't initialize properly - with verbose logging it says
> psm0: unable to allocate IRQ
> When acpi_ibm is removed from the kernel, psm0 works OK.
>
> However, combination of both psm and acpi_ibm used to work at least
> till 6.0-BETA4, which is what I had previously on this laptop.

I have the same problem with my IBM T40p.  If I load acpi_ibm after boot, 
the module loads fine and the mouse continues to work.  It looks like 
acpi_ibm, if loaded by /boot/loader, takes over irq 12 and prevents psm 
from attaching.