I've done some more testing and it seems it's not this bug (sometimes
there is state change to C1 or C2) but I can't get rid of this "ifconfig
: pcnet_open (ei_watchdog)" frequent wakeups.
PowerTOP version 1.10 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (CPU aktywny) ( 0,0%)
polling 0,0ms ( 0,0%)
C1 3,0ms ( 0,4%)
C2 0,1ms (600,0%)
C3 0,0ms ( 0,0%)
Wakeups-from-idle per second : 96936,3 interval: 3,0s
szacowanie użycia energii ACPI jest niedostępne
Top causes for wakeups:
96,4% (250,3) ifconfig : pcnet_open (ei_watchdog)
1,5% ( 4,0) <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)
0,8% ( 2,0) <kernel core> : clocksource_check_watchdog
(clocksource_watchdog)
0,8% ( 2,0) ifconfig : __netdev_watchdog_up (dev_watchdog)
0,1% ( 0,3) sshd : sk_reset_timer (tcp_write_timer)
0,1% ( 0,3) <kernel core> : neigh_table_init_no_netlink
(neigh_periodic_timer)
0,1% ( 0,3) sh : irlmp_start_discovery_timer
(irlmp_discovery_timer_expired)
0,1% ( 0,3) screen : do_setitimer (it_real_fn)
--
Powertop reports that CPU state is C0 100% of the time, regardless of number of
wakeups
https://bugs.launchpad.net/bugs/176553
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