From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pierre Neidhardt Subject: Disable discrete graphics card (Nvidia) Date: Wed, 04 Apr 2018 12:53:25 +0530 Message-ID: <87muyjph8y.fsf@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:36820) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f3cla-0003hi-04 for help-guix@gnu.org; Wed, 04 Apr 2018 03:23:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f3clW-0002l5-Om for help-guix@gnu.org; Wed, 04 Apr 2018 03:23:33 -0400 Received: from mail-it0-x233.google.com ([2607:f8b0:4001:c0b::233]:52108) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1f3clW-0002jv-J7 for help-guix@gnu.org; Wed, 04 Apr 2018 03:23:30 -0400 Received: by mail-it0-x233.google.com with SMTP id b5-v6so15955335itj.1 for ; Wed, 04 Apr 2018 00:23:30 -0700 (PDT) Received: from mimimi ([103.61.255.46]) by smtp.gmail.com with ESMTPSA id y20sm2954030ioy.27.2018.04.04.00.23.27 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 04 Apr 2018 00:23:29 -0700 (PDT) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org Sender: "Help-Guix" To: help-guix --=-=-= Content-Type: text/plain I run a Xiaomi Air 13 with both an embedded Intel and a discrete Nvidia graphics chipset. I'd like to turn off the Nvidia chipset to save battery power and avoid overheating (I live in a hot place). Blacklisting the "nouveau" kernel module prevents the card from being seen by the OS, but the card keeps draining power: (operating-system ;... (kernel-arguments '("modprobe.blacklist=nouveau")) It seems that neither acpi_call nor bbswitch are packaged with Guix. Is there any other commended way? -- Pierre Neidhardt --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEUPM+LlsMPZAEJKvom9z0l6S7zH8FAlrEfW0ACgkQm9z0l6S7 zH+j1Af8CAFyU0F0BTGsWp89EMvhyQsQWZRuontTYtgx3Xahv289SyjuXy4/X0Di VIYvX2251Fj2IEFfFPmkgX7QOBmZ238HRypG9p+7vLF2SL/Rmek8aBXriqpSs6yc plu+WCz2xHIMeDSZwHuGZ6Xt0dsK0RsnfQc1w7fq8dpVdPhj+zp5DAef2PSAh4iM N3TVX+gxmo3uSdcL3AusJj7/MPTpOrr2wSR0++QmypiVlkFWn+KxpQ53m8/bUxtQ nkRV7ryukOWDT8RpREmJB887FrQ/vVkBBQkZksrwtYU9YOctm4e8rTVfA9Wz5OaJ Q8oo9kxxxDxVybFf/6SAnQLniPwDmg== =jayv -----END PGP SIGNATURE----- --=-=-=--