Dear all,
I've ran the just released powertop
( http://www.linuxpowertop.org/powertop.php ) in several configurations
on my mbpc1d to figure out where the power problems lie (see below):
In summary kernelwise the appletouch driver needs fixing (it is a huge
hog...), aswell as fglrx and ath_pci and maybe sky2 too. In userspace
apart from the gnome mixer_applet it is pommed/gpomme.
What I don't understand is why on the powertop homepage they have
a) the C4 state available
b) they claim that 3 wakeups per second are achievable on a full gnome
desktop
c) their ``high'' wakeup count of 193 is 1/10th of what we get... maybe
macbooks with their all intel graphics adapther perform close to that...
Powertop Analysis
=================
(setup: intel cpu in 2.1 GHz mode, ati in 311/297Mhz performance mode,
very low display brightness)
1) bootup in single user mode start only pommed:
power states:
C0: 0.3%
C3: 99.7%
wakeups: 64
causes:
54% usb_uhcd_poll_rh_status (rh_timer_fun)
34% pommed
-> 19.7 W
2) same as 1) but without pommed:
C0: 0.1%
C3: 99.9%
wakeups: 22
-> 19.2 W
3) same as 1) but with appletouch loaded and gpm started (touched
touchpad at least once)
C0: 1.3%
C2: 1.3%
C3: 97.4%
wakeups: 309
causes:
89.5% interrupt ehci_hcd uhci_hcd
-> 20 W
4) same as 1 but ath_pci loaded and ifconfig'd up
C0: 0.5%
C2: 0.5%
C3: 99%
wakeups: 104
-> 20 W
(if you ifconfig down the interface it goes down to the numbers in 1)
5) same as 1) but load fglrx, appletouch and start a minimal X desktop
C0: 1.9%
C2: 1.1%
C3: 96.2%
wakeups: 432
causes:
61%: {e,u}hci_hcd:usb{1,2}
29%: uhci_hcd:usb5,fglrx
-> 22 W
6) same as 5, but this time minimal gnome desktop (new user with only
panel)
C0: 2.1%
C2: 1.3%
C3: 96.6%
wakeups: 467
7) same as 5, but my full gnome desktop
C0: 8%
C2: 5%
C3: 87%
wakeups: 1110
37% uhci_hcd:usb5,sky2,fglrx
30% {e,u}hci_hcd:usb{1,2}
5% wifi0
1.2% pommed
2.4% gpomme
2.4% mixer_applet
Soeren
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