Public bug reported:
PowerTOP version 1.10 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) (10.6%) 1333 Mhz 11.2%
polling 0.0ms ( 0.0%) 1067 Mhz 1.2%
C1 3.8ms ( 0.1%) 800 Mhz 87.5%
C2 5.4ms (21.5%)
C4 2.5ms (67.8%)
This is on a Latitude XT, installed 10/30 from current Intrepid bits.
Wakeups-from-idle per second : 313.3 interval: 15.0s
no ACPI power usage estimate available
Top causes for wakeups:
26.0% ( 54.5) <interrupt> : PS/2 keyboard/mouse/touchpad
23.5% ( 49.2) <kernel IPI> : Rescheduling interrupts
17.7% ( 36.9) <interrupt> : eth1
13.2% ( 27.6) <kernel core> : wl_add_timer (wl_timer)
3.3% ( 6.9) firefox : futex_wait (hrtimer_wakeup)
2.9% ( 6.0) wpa_supplicant : wl_add_timer (wl_timer)
A USB device is active 100.0% of the time:
/sys/bus/usb/devices/2-2
** Affects: ubuntu
Importance: Undecided
Status: New
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Powertop reports a USB device is active 100% of the time.
https://bugs.launchpad.net/bugs/276791
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