Bug 9014

Summary:	acpi-cpufreq uses too much power
Product:	Power Management	Reporter:	Ritesh Raj Sarraf (linux-kernel-bugs)
Component:	cpufreq	Assignee:	cpufreq (cpufreq)
Status:	REJECTED INSUFFICIENT_DATA
Severity:	high
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.22	Subsystem:
Regression:	---	Bisected commit-id:

Description Ritesh Raj Sarraf 2007-09-13 04:05:06 UTC

Most recent kernel where this bug did not occur:
N/A

Distribution:
Debian

Hardware Environment:
Dell XPS M1210
Processor: Intel Core Duo 2.0 Ghz
RAM: 2 GB
GPU: nVIDIA

Software Environment:
Linux 2.6.22 with DynTicks and HI-RES Timers

Problem Description:
Since the time I changed from speedstep-centrino to acpi-cpufreq after reading the deprecated warning, I get only 5 minutes of battery backup on my laptop.
This is ugly.
With speedstep-centrino, I get back to my 1-1.5hrs of battery backup.

Sep 13 15:07:11 learner kernel: speedstep-centrino with X86_SPEEDSTEP_CENTRINO_ACPI config is deprecated.
Sep 13 15:07:11 learner kernel:  Use X86_ACPI_CPUFREQ (acpi-cpufreq) instead.
Sep 13 15:07:11 learner powersaved: Starting powersaved with ACPI support


Steps to reproduce:
Use acpi-cpufreq instead on speedstep-centrino

Comment 1 Ritesh Raj Sarraf 2007-09-13 12:56:40 UTC

Closing this bug as the issue is seen with speedstep-centrino also.
The battery power in anyway is < 10 minutes.