From: "Tomáš Čech" <sleep_walker@gnu.org>
To: Pierre Neidhardt <ambrevar@gmail.com>
Cc: help-guix@gnu.org
Subject: Re: Does Linux 4.16.1 blast out battery time? (9h+ -> 3h+)
Date: Fri, 13 Apr 2018 08:50:59 +0200 [thread overview]
Message-ID: <20180413065059.6tvg2xsx722adl7i@doom> (raw)
In-Reply-To: <871sfjprn8.fsf@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1238 bytes --]
On Fri, Apr 13, 2018 at 11:36:03AM +0530, Pierre Neidhardt wrote:
>
>I just ran a `guix system reconfigure` yesterday and Guix pulled Linux
>4.16.1. Upon reboot, my laptop's battery time had changed from 9h+ to
>3h+! Quite a dramatic regression indeed...
>
>General usage (startup time, etc.) seems to be somewhat slower as well.
>
>As a test, I ran another system reconfigure, changing only the kernel
>version: now on 4.14.33, I'm back to 9h+.
>
>Does anyone know something about this or should I reach out for the
>Linux mailing list?
>
>Note that before installing GuixSD, I was running Void Linux with kernel
>~4.14.5 (off the top of my head) and battery time was 12h+. This might
>be due to the discrete Nvidia card which was completely shut off by
>default, while it's now running with nouveau on GuixSD but I don't know
>how to turn it off.
>
>Insights?
I'm not aware of any regression but I'd recommend to install powertop
and check, which processes are preventing CPU from switching to power
saving modes.
Sometimes it provides interesting results - I usually can spend like
40% more time on battery by closing Icecat and Pavucontrol.
It also can help you with tuning common power management controls.
Best regards,
S_W
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2018-04-13 6:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 6:06 Does Linux 4.16.1 blast out battery time? (9h+ -> 3h+) Pierre Neidhardt
2018-04-13 6:50 ` Tomáš Čech [this message]
2018-04-13 7:33 ` Pierre Neidhardt
2018-04-13 10:14 ` Pierre Neidhardt
2018-04-24 8:37 ` Ludovic Courtès
2018-04-24 13:17 ` Pierre Neidhardt
2018-05-03 6:45 ` Pierre Neidhardt
2018-05-08 21:11 ` Nils Gillmann
2018-05-09 7:20 ` Pierre Neidhardt
2018-05-09 8:19 ` Nils Gillmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180413065059.6tvg2xsx722adl7i@doom \
--to=sleep_walker@gnu.org \
--cc=ambrevar@gmail.com \
--cc=help-guix@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/guix.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.