To quantify my statement (posting #9) these are results of a 5min powertop dump in GDM with firefox+thunderbird idling for 2.6.36-1
Cn Avg residency C0 (cpu running) ( 2.5%) polling 0.0ms ( 0.0%) C1 mwait 0.0ms ( 0.0%) C2 mwait 0.3ms ( 0.5%) C4 mwait 13.9ms (97.0%) P-states (frequencies) Turbo Mode 1.0% 2.50 Ghz 0.0% 1.60 Ghz 0.2% 1200 Mhz 0.1% 800 Mhz 98.6% Wakeups-from-idle per second : 91.4 interval: 300.0s no ACPI power usage estimate available Top causes for wakeups: 16.7% ( 10.8) kworker/0:0 16.3% ( 10.5) [ata_piix] <interrupt> 14.3% ( 9.2) [kernel scheduler] Load balancing tick 12.4% ( 8.0) apt-check 6.9% ( 4.4) [kernel core] hrtimer_start (tick_sched_timer) 3.2% ( 2.0) cpufire_applet 3.1% ( 2.0) [nvidia] <interrupt> 3.0% ( 1.9) firefox-bin ... and 2.6.38-8 Cn Avg residency C0 (cpu running) ( 2.8%) polling 0.0ms ( 0.0%) C1 mwait 0.0ms ( 0.0%) C2 mwait 0.2ms ( 0.3%) C4 mwait 11.8ms (96.9%) P-states (frequencies) Turbo Mode 1.2% 2.50 Ghz 0.1% 1.60 Ghz 0.2% 1200 Mhz 0.2% 800 Mhz 98.3% Wakeups-from-idle per second : 97.5 interval: 300.0s no ACPI power usage estimate available Top causes for wakeups: 33.1% ( 25.4) kworker/0:0 13.9% ( 10.7) [kernel scheduler] Load balancing tick 13.9% ( 10.6) [extra timer interrupt] 8.5% ( 6.5) [ata_piix] <interrupt> 4.4% ( 3.3) [ahci, firewire_ohci] <interrupt> 2.9% ( 2.2) cpufire_applet 2.6% ( 2.0) firefox-bin 2.6% ( 2.0) [nvidia] <interrupt> 2.1% ( 1.6) gnome-terminal The wakeup rate for 2.6.38 is higher indeed but not as excessive as seen by others. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/760131 Title: Power consumption raised significantly in natty -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
