Most recent kernel where this bug did not occur:
Dell XPS M1210
Processor: Intel Core Duo 2.0 Ghz
RAM: 2 GB
Linux 2.6.22 with DynTicks and HI-RES Timers
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
Closing this bug as the issue is seen with speedstep-centrino also.
The battery power in anyway is < 10 minutes.