ACPI error caused by broken asl, how to fix?

John Baldwin jhb at
Fri Feb 3 12:47:10 UTC 2012

On Thursday, February 02, 2012 5:23:25 am Jakob Pedersen wrote:
> Hello there,
> I am running PCBSD 9.0 on a Packard Bell R1926 and having the following
> problems:
> - Suspend resume does put the machine asleep, but it doesn't resume.
> - I am having strange issues with my wifi card, which disconnects if more
> than 2 metres away from the router. Several linux distros seem to suggest a
> general problem with wifi is caused by acpi problems (under linux either
> WiFi works OR USB). My wifi card is RALINK rc61/R2561s using the ral0
> driver. Full specs of the laptop can be found here:
> For trouble shooting I extracted the ASL of the bios and recompiled it
> using iasl. This gave the following error:
> --------
> Intel ACPI Component Architecture
> ASL Optimizing Compiler version 20110527-32
> Copyright (c) 2000 - 2011 Intel Corporation
> packardbell-r1926.asl   3565:                     Return (0x00)
> Error    4080 -        Invalid object type for reserved name ^  (found
> INTEGER, requires Buffer)
> ASL Input:  packardbell-r1936.asl - 3577 lines, 109288 bytes, 1236 keywords
> Compilation complete. 1 Errors, 0 Warnings, 0 Remarks, 572 Optimizations
> --------
> The ASL can be found here:
> I had a look at the ASL code and it appears to cause problems in ALKD as
> mentioned in the dmesg:

It's not trivial to fix this warning, but I also strongly doubt it will
do anything to help your wifi card.  If your wifi card works at all (gets
interrupts, etc.), then worrying about ALKD is just a red herring.  You
might ask on mobile at about debugging your wifi issues.

As far as suspend and resume, resume is not very easy to debug when it
doesn't work.  Does your screen come back at all if you resume or does it
just stay black?

John Baldwin

More information about the freebsd-acpi mailing list