This achieves about 20-30 watts. Here's the cpuinfo:
cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 14 model name : Genuine Intel(R) CPU T2500 @ 2.00GHz stepping : 8 cpu MHz : 1000.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr bogomips : 3999.16 clflush size : 64 processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 14 model name : Genuine Intel(R) CPU T2500 @ 2.00GHz stepping : 8 cpu MHz : 1000.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr bogomips : 3994.72 clflush size : 64
Powertop
Cn Avg residency P-states (frequencies) C0 (cpu running) ( 7.5%) 2.00 Ghz 0.0% polling 0.0ms ( 0.0%) 1.84 Ghz 0.0% C1 0.0ms ( 0.0%) 1.67 Ghz 0.0% C2 0.0ms ( 0.0%) 1000 Mhz 100.0% C4 6.0ms (92.5%) Wakeups-from-idle per second : 154.0 interval: 15.0s no ACPI power usage estimate available Top causes for wakeups: 25.6% ( 57.7) USB device 1-2 : Apple Internal Keyboard / Trackpad (Apple Computer) 22.8% ( 51.3) : uhci_hcd:usb1, ehci_hcd:usb5 15.6% ( 35.1) : extra timer interrupt 11.3% ( 25.5) : Rescheduling interrupts 7.3% ( 16.5) : acpi 6.1% ( 13.7) : wifi0 2.2% ( 5.0) pommed : sys_timerfd_settime (timerfd_tmrproc) 1.8% ( 4.0) : usb_hcd_poll_rh_status (rh_timer_func) 1.3% ( 2.9) wpa_supplicant : scan_restart (scan_next) 1.1% ( 2.5) firefox-bin : futex_wait (hrtimer_wakeup) 0.9% ( 2.1) Xorg : schedule_timeout (process_timeout) 0.9% ( 1.9) : input_handle_event (input_repeat_key) 0.5% ( 1.1) : uhci_hcd:usb2, firewire_ohci, ata_piix 0.4% ( 1.0) openbox : schedule_timeout (process_timeout) 0.4% ( 0.9) : queue_delayed_work_on (delayed_work_timer_fn) 0.3% ( 0.6) gnome-screensav : schedule_timeout (process_timeout) 0.2% ( 0.5) gnome-panel : schedule_timeout (process_timeout) 0.1% ( 0.3) gnome-power-man : schedule_timeout (process_timeout) 0.1% ( 0.3) Xorg : do_setitimer (it_real_fn) 0.1% ( 0.3) : uhci_scan_schedule (uhci_fsbr_timeout) 0.1% ( 0.3) nautilus : schedule_timeout (process_timeout) 0.1% ( 0.3) hald : schedule_timeout (process_timeout) 0.1% ( 0.2) init : schedule_timeout (process_timeout) 0.1% ( 0.2) wpa_supplicant : __netdev_watchdog_up (dev_watchdog) 0.1% ( 0.2) mapping-daemon : schedule_timeout (process_timeout) 0.1% ( 0.2) : neigh_table_init_no_netlink (neigh_periodic_timer) 0.1% ( 0.1) gdm : start_this_handle (commit_timeout) 0.0% ( 0.1) dhclient3 : schedule_timeout (process_timeout) 0.0% ( 0.1) cron : do_nanosleep (hrtimer_wakeup) 0.0% ( 0.1) touch : start_this_handle (commit_timeout) 0.0% ( 0.1) : ip_rt_init (delayed_work_timer_fn) 0.0% ( 0.1) firefox-bin : uhci_scan_schedule (uhci_fsbr_timeout) 0.0% ( 0.1) : neigh_add_timer (neigh_timer_handler) A USB device is active 100.0% of the time: USB device 1-2 : Apple Internal Keyboard / Trackpad (Apple Computer)
Heat
By far the biggest problem I've had with my Macbook has been its heat. I finally tracked down a solution! By setting laptop mode to on while power is supplied by AC, the temperature of the device drops significantly. This is great!
'''/etc/laptop-mode/laptop-mode.conf '''
ENABLE_LAPTOP_MODE_ON_AC=1
External Links
- http://wiki.debian.org/MacBook
- http://dentifrice.poivron.org/laptops/macbook/