i386/57909: ACPI related slowness on an ASUS M2400N notebook

[Stefan Walter]

>Number:         57909
>Category:       i386
>Synopsis:       ACPI related slowness on an ASUS M2400N notebook
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 12 12:00:36 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Stefan Walter
>Release:        FreeBSD 5.1-RELEASE-p2 i386
>Organization:
Infinity Approximation Task Force
>Environment:
System: FreeBSD kyuzo.dunkelkammer.void 5.1-RELEASE-p2 FreeBSD 5.1-RELEASE-p2 #0: Wed Sep 24 11:41:19 CEST 2003 root at kyuzo.dunkelkammer.void:/usr/src/sys/i386/compile/KYUZO i386
>Description:
I'm seeing the following problems on an ASUS M2400N notebook running
FreeBSD 5.1 (5.0 had the same issues):

- Occasionally, the whole system becomes *very* slow (including keyboard
  and touchpad/USB mouse). 'top -S' shows the three processes
  acpi-task{0,1,2} each at about 33%. Some time later, they get back to
  their normal values around 0% and the system is usable again. The
  duration of this slowness varies, and there isn't any obvious event
  starting or stopping it (although it *seems* like sometimes, pulling
  the AC adapter off or plugging it in helps).
- The described behaviour can often, but not always, be reproduced by
  booting the notebook with the AC adapter plugged in; then, the system
  is slow right after booting the kernel, so the execution of startup
  scripts takes up to 2-3 minutes. Booting on battery power and plugging
  in the AC adapter afterwards works fine.

Kernel configuration:
http://www.gegenunendlich.de/stuff/garuda/GARUDA
Dmesg right after booting:
http://www.gegenunendlich.de/stuff/garuda/garuda.dmesg
Output of acpiconf:
http://www.gegenunendlich.de/stuff/garuda/garuda.asl
http://www.gegenunendlich.de/stuff/garuda/garuda.dsdt
>How-To-Repeat:
See description.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: