Hi! I upgraded to kernel 2.6.24-rc2 and noticed these new lines in powertop: 22.2% (143.1) <kernel IPI> : Rescheduling interrupts 12.1% ( 78.4) <interrupt> : extra timer interrupt
the latter is not actually new, but with kernel 2.6.23 it was always around 5-10 wakeups if any. I guess it has something to do with CPU IRQ rescheduling, but is there a way to make it disappear again? I noticed also no improvements in energy consumption, despite new acpi patches: it was ~25W it is still ~25W if not more! C states and P states seem good: Cn Avg residency P-states (frequencies) C0 (cpu running) ( 2.7%) 2.01 Ghz 0.0% C1 0.0ms ( 0.0%) 2.00 Ghz 0.0% C2 0.2ms ( 0.0%) 1.60 Ghz 0.0% C3 8.7ms (97.2%) 800 Mhz 100.0% even though my laptop (HP Pavilion dv6575 with Intel Centrino Core 2 Duo Santa Rosa platform) should support C4 power state, but this is not displayed although it is activated in BIOS. What's more the latest BIOS update F.22A from HP breaks completely the power management features of Intel Santa Rosa since with 2.6.22 kernel I get 90% time in C0 state with only ~35 wakeups while whitout changing anything else but the bios (I currently run F.09) wakeups stay the same but the CPU goes mostly of the time in C3. Thank you for your support
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