CentOS - Feb 2016 - power management / tuned following external power source

hi,

twice in the last week I've been caught out where the laptop was running
tuned with 'throughput-performance' profile on the work table, and I
walked away, carried on working - and had the battery run flat in just
over an hour.

Compare this with tuned running the 'powersave' profile - will usually
take the battery through to 3hrs+ - and if i just totally turn down the
cpu's in the powersave mode, I can get 5 hrs+ on the x1 carbon gen2
laptop I've got.

So what I am wondering is if there is an easy way to have the tuned-adm
reset profiles based on external power source. If I'm at the work table
and plugged in, run with throughput-performance mode, and if the
external power is disconnected, run in powersave mode ? I've had,
admittedly a brief, look and found nothing obvious. Has anyone else run
into this before ?

Regards

-- 
Karanbir Singh
+44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh
GnuPG Key : http://www.karan.org/publickey.asc

On 02/28/16 04:43, Karanbir Singh wrote:
<>
> So what I am wondering is if there is an easy way to have the tuned-adm
> reset profiles based on external power source. If I'm at the work table
> and plugged in, run with throughput-performance mode, and if the
> external power is disconnected, run in powersave mode ? I've had,
> admittedly a brief, look and found nothing obvious. Has anyone else run
> into this before ?
>
--

do not know about 'tuned-adm', i presume you added it, or it is
centos 7.x. therefore i can not reply to your questions, other than
to ask if you use kde and have looked at what it provides.

with centos 6.7 and kde desktop on my laptop, i use the power control
setting provided by;

  system settings > advanced > power management

with this, i am able to config settings to handle about all conditions,
including 'power save mode' and no external power.

having recently purchased a new 6600 mAH battery, i am curious as to
just how long laptop will run 'off mains' before i get a notice and
have to recharge. so far, my longest run is around 4 hrs, with time
left. i do not recall what % battery icon showed.

selectable settings are;

  powersave     performance     aggressive powersave
  xtreme powersave     presentation

each 'type' also has selection for action to apply.

so, if you are running kde, i will suggest checking out the provided
'power management' control,


-- 
peace out.

If Bill Gates got a dime for every time Windows crashes...
 ...oh, wait. He does. THAT explains it!
-+-
in a world with out fences, who needs gates.

CentOS GNU/Linux 6.7

tc,hago.

g
.