[Solved] Powertop2 tunables

cypherinside · 2012-03-08 11:54:05

Bad Wireless Power Saving for interface wlan0
Bad Enable SATA link power management for /dev/sda
Bad NMI watchdog should be turned off
Bad Power Aware CPU scheduler

How can I fix?

Last edited by cypherinside (2012-03-09 13:39:07)

bohoomil · 2012-03-08 12:29:00

Press 'Enter' on each entry. Besides, for a more permanent effect, you can add the following (I believe) to your /etc/rc.local:

echo 0 > /proc/sys/kernel/nmi_watchdog

for i in /sys/class/scsi_host/host*/link_power_management_policy; do
    echo min_power > $i
done

echo 1 > /sys/devices/system/cpu/sched_mc_power_savings

iwconfig wlan0 power timeout 500ms

cypherinside · 2012-03-08 13:22:30

Thank you. Wireless power saving don't work: i have

Error for wireless request "Set Power Management" (8B2C) :
    invalid argument Error for wireless request "Set Power Management" (8B2C) :
    invalid argument "500ms"

(but it happen with any argument). I think it's a driver issue (I have an Atheros AR9285).
PS: do these options influence negatively the performaces? Because I can set them only on battery mode (not in AC).

bohoomil · 2012-03-08 14:08:49

As for 2., I don't think so; I've been using powertop2 values mainly to lower the temperature of my laptop's guts and haven't noticed any noticeable degradation in performance. The reason may certainly be the pretty modest set of default apps, though. I also don't always reduce power consumption for wifi card, and only do so (manually via powertop2 interface) when the signal level is high.

For 1., try simply using

sudo iwconfig wlan0 power on

cypherinside · 2012-03-09 13:38:29

I solved installing laptop-mode-tools

Arch Linux

#1 2012-03-08 11:54:05

[Solved] Powertop2 tunables

#2 2012-03-08 12:29:00

Re: [Solved] Powertop2 tunables

#3 2012-03-08 13:22:30

Re: [Solved] Powertop2 tunables

#4 2012-03-08 14:08:49

Re: [Solved] Powertop2 tunables

#5 2012-03-09 13:38:29

Re: [Solved] Powertop2 tunables

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