linux-input.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Vojtech Pavlik <vojtech@suse.cz>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>, linux-input@vger.kernel.org
Subject: Re: Half second spend in i8042 during suspend on TUXEDO BU1406
Date: Thu, 9 Feb 2017 12:24:04 +0100	[thread overview]
Message-ID: <20170209112404.GB8852@suse.cz> (raw)
In-Reply-To: <47598acc-5634-0426-43c9-7cb9bde13910@molgen.mpg.de>

On Thu, Feb 09, 2017 at 10:17:56AM +0100, Paul Menzel wrote:

> Starting Linux with that, the delay is gone.
> 
> Before:
> 
> > i8042 @ i8042 {i8042} sync_device (Total Suspend: 546.038 ms Total Resume: 3.850 ms)
> 
> After:
> 
> > i8042 @ i8042 {i8042} sync_device (Total Suspend: 0.973 ms Total Resume: 1.369 ms)
> 
> What downsides are there of using that `i8042.nomux=1`? Is any
> functionality lost?

If the notebook doesn't implement the Active AUX Multiplexing
specification, then there is no functionality lost. 

If it does, and apparently yours doesn't, then you lose the ability to
distinguish between the internal touchpad/touchpoint and an external
connected PS/2 mouse and lose the ability to use any advanced protocol
beyond standard PS/2 mouse.

Apparently the TUXEDO Book BU1406 doesn't have any external AUX port for
mouse, only USB and internally it only seems to have one touchpad, so
there is no need for Active AUX Multiplexing.

> >If that helps, it can be added to a blacklist based on DMI.
> Sounds good.
> 
> $ journalctl -k | grep 'DMI:'
> Feb 09 10:15:04 helmuth-N24-25BU kernel: DMI: Notebook
> N24_25BU/N24_25BU, BIOS 5.12 10/11/2016

A full output of 'dmidecode' would be more useful.

-- 
Vojtech Pavlik
Director SUSE Labs

  reply	other threads:[~2017-02-09 11:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <234cc57f-6922-d866-e457-66eb2cafb85d@molgen.mpg.de>
2017-02-08 13:33 ` Half second spend in i8042 during suspend on TUXEDO BU1406 Paul Menzel
2017-02-08 23:58 ` Vojtech Pavlik
2017-02-09  9:17   ` Paul Menzel
2017-02-09 11:24     ` Vojtech Pavlik [this message]
2017-02-09 16:07       ` Paul Menzel

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=20170209112404.GB8852@suse.cz \
    --to=vojtech@suse.cz \
    --cc=dmitry.torokhov@gmail.com \
    --cc=linux-input@vger.kernel.org \
    --cc=pmenzel@molgen.mpg.de \
    /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.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).