Public bug reported:
In just so many words, plasma-desktop is reported too cause too many
wakeups/sec to be acceptable for laptop use. This is from a completely idle
session.
KDE version is 4.3RC2 from Karmic.
System is an Asus N20A (core 2 duo, all intel gm45).
PowerTOP 1.11 (C) 2007, 2008 Intel Corporation
Collecting data for 15 seconds
< Detailed C-state information is not available.>
P-states (frequencies)
2.00 Ghz 7.6%
1.60 Ghz 0.5%
800 Mhz 91.9%
Wakeups-from-idle per second : 250.2 interval: 15.0s
no ACPI power usage estimate available
Top causes for wakeups:
57.0% (215.1) plasma-desktop : hrtimer_start_range_ns (hrtimer_wakeup)
22.4% ( 84.7) <interrupt> : iwlagn
13.3% ( 50.3) kwin : hrtimer_start_range_ns (hrtimer_wakeup)
2.1% ( 7.9) <interrupt> : ahci
1.1% ( 4.0) <kernel core> : usb_hcd_poll_rh_status (rh_timer_func)
0.7% ( 2.7) <kernel IPI> : Rescheduling interrupts
[...]
** Affects: kdebase-workspace (Ubuntu)
Importance: Undecided
Status: New
--
powertop reports way too many wakeups in idle state (plasma-desktop)
https://bugs.launchpad.net/bugs/398133
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