Is this ok, for an idle system (by powertop): P-states (frequencies) 1.60 Ghz 0.0% 800 Mhz 100.0% Wakeups-from-idle per second : 561.9 interval: 10.0s no ACPI power usage estimate available Top causes for wakeups: 82.6% (925.0) <interrupt> : extra timer interrupt 8.0% ( 90.0) mplayer : do_nanosleep (hrtimer_wakeup) 4.2% ( 46.9) <interrupt> : ohci_hcd:usb2, HDA Intel 1.8% ( 20.6) X : do_setitimer (it_real_fn) 1.5% ( 17.0) X : schedule_timeout (process_timeout) 1.2% ( 13.6) kicker : schedule_timeout (process_timeout) Double core Turion 64 (Dell inspiron 1501) on F8 Seems as my second core does not function? In dmesg I see a lot of: APIC error on CPU0: 40(40) APIC error on CPU1: 40(40) and the 8254_timer not connected at the kernel booting. IS there a way to fix it? PS My googling helped me nothing...