No, I wasn't doing anything at all with the mouse when I recorded the
information from Powertop. Also, the other USB device was just an empty
flash card that I left plugged in. I closed out of everything before
refreshing Powertop, including all file manager windows. Perhaps not
surprisingly, leaving any browser open brings the wakeups far above 2000
per second, consistently.
Out of curiosity, I unplugged the flash drive and mouse, and the results
are the same. i915 and Load balancing tick are, as usual, at the top of
the list, but why PS/2 keyboard/mouse/touchpad (or more often "USB
device 1-4 : USB2.0-CRW (Generic)" at about the same value) should,
consistently, especially when I'm not using them, seems weird. I don't
know.
PowerTOP version 1.13 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 1.8%) 2.17 Ghz 0.0%
polling 0.0ms ( 0.0%) 1.67 Ghz 0.0%
C1 mwait 10.0ms (49.0%) 1333 Mhz 0.0%
C3 mwait 0.5ms (49.3%) 1000 Mhz 100.0%
Wakeups-from-idle per second : 1141.2 interval: 3.0s
no ACPI power usage estimate available
Top causes for wakeups:
19.7% ( 33.7) [kernel scheduler] Load balancing tick
16.8% ( 28.7) [i915] <interrupt>
16.2% ( 27.7) PS/2 keyboard/mouse/touchpad interrupt
8.4% ( 14.3) phy0
I'll try the stuff you mentioned.
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https://bugs.launchpad.net/bugs/760131
Title:
Power consumption raised significantly in natty
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