Mark Haywood wrote:
Antonello Cruz wrote:
Aubrey Li wrote:
On Tue, Apr 28, 2009 at 3:05 AM, Henrik Johansson <[email protected]> wrote:

My power management works fine when I first boot my Lenovo T61, but after putting it into suspend mode it will always run on the highest frequency.
I see the same behavior with a Dell XPS 1330M
I've notice that if I disconnect the power adapter and then reconnect, it goes to a more same behavior.
So that I can do some investigation ... I assume you are running CPUPM in poll-mode?
That's right, I've attached my power.conf file


Since I cannot type (apparently) here is what happens:
If I suspend/resume, after resume powertop report max P-state (2001Mhz(turbo) 100%) and it seems the system is stuck at that cpu frequency. This is confirmed with
   kstat -m cpu_info -s current_clock_Hz

If I unplug the power supply, the cpu frequency drops to 800MHz. When I plug the power supply back in, the frequency goes up to 2001Mhz and gradually goes down to 800MHz again. Frequencies in all steps are confirmed with
    kstat -m cpu_info -s current_clock_Hz


Antonello
#
# Copyright 1996-2002 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
#pragma ident   "@(#)power.conf 2.1     02/03/04 SMI"
#
# Power Management Configuration File
#

device-dependency-property removable-media /dev/fb
autopm                  default
autoS3                  default
cpu-threshold           1s
# Auto-Shutdown         Idle(min)       Start/Finish(hh:mm)     Behavior
autoshutdown            30              9:00 9:00               noshutdown
cpupm  enable   poll-mode
S3-support      enable
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