Re: PowerTop on Debian Stretch
Thanks fo reporting, this is actually good practice, so that others can
benefit.
Loredana
On Thu, 2016-02-11 at 09:33 +0400, Dwijesh Gajadur wrote:
> Guys, I am glad to tell you that my problem has been solved.
>
> The problem was actually with my AMD GPU. Thank you Arian, for driving
> my attention on the GPU.
>
> I followed the instructions on
> https://wiki.debian.org/AtiHowTo#Debian_Stretch_.28testing.29
>
> and installed the missing firmwares and packages. After that I ran
> powertop --calibrate and then powertop --auto-tune.
>
> I can now get a battery life of up to 6-7 hr on Debian 😁
>
>
> What happened according to me was that PowerTop was not able to detect
> my AMD GPU as the required firmware was not installed. After
> installing the firmware, PowerTop was able to calibrate properly and
> take the correct measurements.
>
>
> Richard Owlett wrote:
>
> >Please note use of present tense.
> >I see two possible interpretations:
> > 1. he has a multi-boot installation. In which case he is NOW
> getting longer run
> > times in Windows and Ubuntu than in Debian.
> > 2. he did a clean install of Debian and saw an IMMEDIATE decrease
> in run time.
>
> >If that is not so, I ask Mr. Gajadur to clarify.
>
>
> Yes I actually have a dual boot installation. I first Dual booted
> Windows 7 and Debian 9. After finding that the battery life on Debian
> was only 3 hr, I replaced the Debian installation with Ubuntu 15.10
> installation just to see how the battery life is on Ubuntu. I found
> that I could get a battery life of up to 5hr after using PowerTop on
> Ubuntu. However I am not a fan of Ubuntu. Debian is the only linux
> distro I love. So I removed Ubuntu and re-installed Debian and tried
> to find out what was causing the low battery life on Debian.
>
> But now there is nothing to worry about as the problem has been solved
> thanks to Arian.
>
>
>
> I want to thank you all for your comments and help 😀
>
>
> Best Regards,
>
>
> Dwijesh
>
>
>
>
> On Wed, Feb 10, 2016 at 11:39 PM, David Wright
> <deblis@lionunicorn.co.uk> wrote:
> On Wed 10 Feb 2016 at 11:32:48 (+0530), Jos Collin wrote:
> > Hi, I'm not answering your question. But my suggestion is:
> don't bother about
> > your battery life. Because even if you get 10 hours now, it
> is going to reduce
> > slowly and reach 30 mins or 10 mins with in a few years.
> Then you have to
> > replace your battery with a new one.
> >
> > I had a battery that drains to 0% with in 30 secs. I
> replaced that in 2012 with
> > a 9 cell battery, when I started traveling with my laptop.
> The new battery also
> > drains to 0% within 30 secs now.
> >
> > So I advice you to forget about battery life and move on to
> other important
> > things. :-)
>
> The (small size) battery on this laptop contains 42Wh fully
> charged.
> Discharging it in 30 seconds would generate 5kW which is two
> high-power electric kettles in the UK, over three in the US.
>
> So either your battery hasn't charged properly, or else it's
> not
> discharging properly, probably because there's a duff cell. In
> the
> latter case, the battery remains a hazard because it still
> contains a
> lot of charge if only it could find a discharge path.
>
> > On 10-Feb-2016 11:05 AM, "Dwijesh Gajadur"
> <dwijesh1@gmail.com> wrote:
> > I have a Dell Inspiron 5559 laptop which has a 40WHr,
> 4-cell battery. On
> > Windows 7 I get a battery life of 6-7 hours. On Ubuntu I
> get a battery life
> > of 5 hours after using PowerTop.
> > However on Debian I get only 3 hours of battery life. I
> have done
> > calibration several times and for several hours but I
> get only 3 hours of
> > battery life.
>
> If these timings can be achieved at will, I'd be interested to
> know if
> the laptop was running at the same temperature on the various
> OSes. A
> poor video driver might waste a lot of power. I suspect this
> is the
> case with my own Dell laptop; given the chance it would make a
> cuppa.
> I occasionally see the CPU at 96.5°C.
>
> > My Question is, is it normal to get the lines:
> > □ Cannot load from
> file /var/cache/powertop/saved_parameters.powertop
> > □ Devfreq not enabled
> > Is it because of these lines that PowerTop is unable to
> extend the battery
> > life?
> > Debian Stretch is currently using PowerTop version 2.8
> and I heard
> > somewhere on a forum that there is a bug in the 2.8
> version. Is it true
> > that there is a bug ? And is it that bug which is
> causing the problem?
>
> Does
> https://bugs.debian.org/cgi-bin/pkgreport.cgi?dist=unstable;package=powertop help?
>
> Cheers,
> David.
>
>
>
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