Re: Improving Linux laptop battery life: Testers Wanted

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Hi,

On 26-09-17 16:59, Germano Massullo wrote:
This message may be useful to others having my similar problem.
On a Thinkpad X220, after having booted the custom kernel, running

[root@machine]# cat /sys/class/scsi_host/host0/link_power_management_policy

I get

max_performance

instead of

med_power_with_dipm


Here some machine details

[root@machine]# cat /etc/rc.d/rc.local
#!/bin/sh

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


[root@machine]# ls -latr /etc/rc.d/rc.local
-rwxrwxr-x. 1 user user 119 13 set 14.53 /etc/rc.d/rc.local

It might be that systemd does not like that rc.local is owned
by "user" rather then "root" ? Have you tried manually
executing rc.local as root:

/etc/rc.d/rc.local

And / or have you tried to do the echo manually as root ?

Regards,

Hans
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