From owner-freebsd-questions@freebsd.org Thu Jul 15 08:40:36 2021 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 6D2B2661B31 for ; Thu, 15 Jul 2021 08:40:36 +0000 (UTC) (envelope-from tomek@cedro.info) Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GQSW82Thwz3mcj for ; Thu, 15 Jul 2021 08:40:36 +0000 (UTC) (envelope-from tomek@cedro.info) Received: by mail-wr1-x436.google.com with SMTP id f9so6639526wrq.11 for ; Thu, 15 Jul 2021 01:40:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cedro.info; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qQj9uQzU4sY4yhQtmsye+kTNPJ+kzniZEQ8iMbgwegs=; b=fJzvS4Z3NyGdtLrkmEWW+FXqWOZsUK7ldMuloPk2KzGpXbLlAtYy+ACneh7MfTfXnq jazRlF7hgZOKQEAUk7HwCck2rUjF31Q0+YBadnJG6uWoLWfsNd2F2oxfW3qaqoa+FhBu X6a3DyMcmm4MjV53IKhf4tFX5QmYCzzf9kCDl00+6MpapAgIuZo6eVNhEzLHYAL8twba +WlDvV6glPARVONp61FxyjFt6xP8436GkjagJzB6HfT7hACLBwvtC2PEqFq7xLnqr1+c MJyNcP5SzIP9cNZgqHp+Vsddgnuva92KFTsYeDvEKfFXzPsMnLkHWk4LnqH4IeZn+L6g DpYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=qQj9uQzU4sY4yhQtmsye+kTNPJ+kzniZEQ8iMbgwegs=; b=pazk5tJ5EIoX5A8wdl38ZE8eA7SwxYKhzto6/9J7idFHejdzp0KqgfQDTHCiroH1xy oFOTtqyF0V1DUvjXLoRVA84mk8GUkZt/h+Kr3Tf7BsE7l8+ChN4f8uKHKA2/CnXkOiok MHFV5+j4cZXfe1SAC4ft7iFlrcgJRjYTpX2s9c2TOOwJMkERuX5T52k0oiY2NvtnGSJ3 peZnj4bG5m+4AZjoJNCtCbRjAPxdaz6ibJJStDLRAhHVp31LTxj2wk7mBFf+aBNQeNM7 xdnfIN68ljK+IHtCA3RXDC2N0M0TwOqfqOjwkfFzKp3NkPOHgKrkk5ki3K2Ii7RCOaTm VbCQ== X-Gm-Message-State: AOAM531LSksrTO/JTmkymlO0GYGeSBMkDzj/XaY/3UGEPhkn6/s+g9vW lBo9pZOVAABeGJjZo9gnA2hHbEHWFYSqDvSP4LzBXw== X-Google-Smtp-Source: ABdhPJxMqnSi1esCh6bID9AEO5DTOd7RtB8bdWYX8Cy3G2N3SI+lSUxH0OsBe3ImqwE6G20o6e2trIqtAqZ8lyliHSc= X-Received: by 2002:adf:fcc9:: with SMTP id f9mr3955072wrs.133.1626338434799; Thu, 15 Jul 2021 01:40:34 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Tomasz CEDRO Date: Thu, 15 Jul 2021 10:40:23 +0200 Message-ID: Subject: Re: How to turn HDMI video off but keep audio on (slightly OT?) To: Aryeh Friedman Cc: freebsd-multimedia@freebsd.org, FreeBSD Mailing List X-Rspamd-Queue-Id: 4GQSW82Thwz3mcj X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; TAGGED_RCPT(0.00)[]; REPLY(-4.00)[] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.34 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jul 2021 08:40:36 -0000 On Thu, Jul 15, 2021, 10:21 Aryeh Friedman wrote: > > On Thu, Jul 15, 2021 at 4:09 AM Tomasz CEDRO wrote: > >> there is /dev/dsp for each audio sink. have you tried cat /dev/random >> >/dev/dspN for N=0,1,.. and check wherher noise is produced over hdmi when >> monitor is enabled/disabled in/without WM? >> > > Already tried that (should of mentioned it in the original post) > then you may try to put monitor into some sort of dpms sleep mode (see xset s and xset dpms), so it does not power off, just keep audio out, that may depend on the particular device how it has power management implemented. this may contain some hints: https://unix.stackexchange.com/questions/52263/how-can-i-put-my-hdmi-display-into-and-out-of-power-save-mode -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info >