From: Gerfried Maier <moali@sbox.tugraz.at>
To: linux-acpi@vger.kernel.org
Subject: CPU - Power state (Cx) usage count not working
Date: Mon, 23 Jan 2006 09:19:49 +0100 [thread overview]
Message-ID: <43D491A5.6010000@sbox.tugraz.at> (raw)
Hi everybody!
According to the ACPI4Linux doc
cat /proc/acpi/processor/CPU0/power
should look like
active state: C2
default state: C1
bus master activity: 00004f00
states:
C1: promotion[C2] demotion[--] latency[000]
usage[00033670]
*C2: promotion[C3] demotion[C1] latency[084]
usage[00357060]
C3: promotion[--] demotion[C2] latency[120]
usage[00000000]
Unfortunaltely on my system (P4m 1800Mhz; 2.4.31 or .32) the usage count
shows always 00000000. Unloading several modules (eg usb-ohci) has no
effect.
IIrc the count and the statistics were working in earlier times (arond
2.4.25+) All of them vanilla with the preemptive patch from
http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/v2.4/
Is there anything I can do to figure out more on the reason?
Of course I would like to know whether this is only a symptom for a
minor proble or wheher the whole power-state thing is not working,
resulting in shorter battery life.
Thanks for your help!
G. Maier
next reply other threads:[~2006-01-23 8:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-23 8:19 Gerfried Maier [this message]
2006-01-23 10:40 ` CPU - Power state (Cx) usage count not working Niko Ehrenfeuchter
2006-01-23 11:39 ` Gerfried Maier
2006-01-23 12:33 ` Niko Ehrenfeuchter
2006-02-01 14:44 ` Gerfried Maier
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