ACPI Attach (acpi_ibm) stops mouse from working

[Kevin Oberman]

> Date: Mon, 22 Oct 2007 17:04:52 +0100
> From: Tom Judge <tom at tomjudge.com>
> Sender: owner-freebsd-mobile at freebsd.org
> 
> Hi,
> 
> 
> I have recently setup an IBM/Lenovo T43 with RELENG_7 as of mid last 
> week, however I have a problem with the acpi_ibm module.
> 
> If I add acpi_ibm_load="YES" to loader.conf I get the following message 
> during boot:
> 
> psm0: unable to allocate IRQ
> 
> This is followed by a message stating that the acpi_ibm module has 
> attached to IRQ 12.
> 
> If I remove this module from loader.conf and boot the system the mouse 
> attaches and works as expected.  If I then kldload acpi_ibm the module 
> attaches to acpi0.
> 
> 
> Is there any way to make this work without loading the acpi module after 
> boot?

I have a T43 and see the same thing if I load drivers in
/boot/loader.conf. I have seen it with both umass and it's USB brethren,
and if_ath. If I build them into the kernel or load them after the
system boots, there is no problem. Otherwise, no IRQ for the mouse (and
no mouse).

But you don't have to explicitly load ACPI. It's "magic" and
automatically loads if you don't disable it in hints. If it loads that
way, I have never had problems with the mouse.

jhb had some ideas of what caused the problem, but I have never had
time to pursue it and it is pretty rare.

Try removing the load from /boot/loader.conf and see if it works and if
you still get ACPI.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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