On 02/22/2010 09:04 AM, Stefano Z. wrote:
no, my dual celeron su2300 dosen't support speedstep, it stay fixed to 1.2ghz
but i have found the problem, i think this problem have to do with KMS...
I have istalled kernel26 2.6.31.6-1 and the problem disappered but obviously
this is not the solution i want ;-)
If i install 2.6.32+ kernel the problem reappear.
Another thing that happens is that the cpu(s) Temperature with kernels
2.6.31 stay
about on 53+C while with kernel<2.6.32 stays on 42C...
On Mon, Feb 22, 2010 at 9:43 AM, Andrea Fagiani<andfagiani@xxxxxxxxx> wrote:
On 02/22/2010 04:53 AM, Brendan Long wrote:
On 02/21/2010 04:55 PM, Xavier Chantry wrote:
On Mon, Feb 22, 2010 at 12:42 AM, Stefano Z.<mie.iscrizioni@xxxxxxxxx>
wrote:
hi
i've bought a new notebook (hp pavilion dm1-1150sl) and installed
archlinux.
i have see a strange thing with powertop, i'm running the vanilla arch
kernel26,
and i have see this behaviour:
Cn Avg residency P-states (frequencies)
C0 (cpu occupata) (31,6%)
C0 0,0ms ( 0,0%)
C1 mwait 0,1ms ( 0,7%)
C4 mwait 0,0ms (67,8%)
Wakeups-from-idle per second : 31483,5 interval: 10,0s
---
as you can see, i have a LOT of wakeups per seconds very low c1 states
lot of c0 and c4 states,
a wattmeter tell me that archlinux consume about 25/26watt
Then i have boot a live ubuntu distro and see this:
Cn permanenza media P-state (frequenze)
C0 (cpu occupata) ( 0,6%)
polling 0,0 ms ( 0,0%)
C1 mwait 26,7 ms (68,6%)
C4 mwait 1,2 ms (30,8%)
Wakeup-da-idle al secondo: 281,3 intervallo: 15,0s
---
as you can see the wakeups are a LOT lower than on arch and we have
lot of c1 and c4 state,
power consumption is about 20W, the same that i have with win7 (about
18/20w).
For meaning about cX state see here:
http://www.lesswatts.org/projects/powertop/powertop.php
thanks!
You didn't give enough information so we will need to check the basis :
- which cpufreq driver and governor are you using in both cases (check
cpufreq-info)
- what processes does powertop show as causes for wakeups ?
- what processes does top show in term of cpu usage ?
Here is what I got in the last few minutes when i was writing this :
C4 mwait 3.4ms (92.5%) 800 Mhz 98.0%
Wakeups-from-idle per second : 279.4 interval: 10.0s
I have a core 2 duo with acpi-cpufreq loaded and conservative governor.
$ grep cpufreq /etc/rc.conf
MODULES=(acpi-cpufreq)
DAEMONS=(syslog-ng net-profiles crond dbus hal alsa cpufreq
storage-fixup)
$ grep governor /etc/conf.d/cpufreq
# valid governors:
governor="conservative"
They may just not have cpu-freq-utils installed maybe? I'm using
laptop-mode-tools with compiz and GNOME running (but not doing anything)
and it's saying 99.2% C4, 0.8% C0. This is with another Core2 and
laptop-mode is set to use the powersave governor on battery (which is
how I tested). When I plug it in, it jumps up to 25%, but I don't really
care how active the processor is when it's on battery.
Be sure to have cpu-freq-utils installed, as well as loading the right
modules (acpi-cpufreq, cpufreq_ondemand, if you plan on using the same
governor as ubuntu does), and add `cpufreq` to your DAEMONS array in
rc.conf.
On my system, with laptop-mode-tools the powertop output is very similar to
what Brendan said. Also, the 31k+ wakeups definitely mean there's some issue
on your config.
If you think it's KMS causing problems, try adding `nomodeset` to your
kernel boot line and see what happens.
