From nobody Thu Dec 14 23:39:33 2023
X-Original-To: freebsd-multimedia@mlmmj.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
	by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4SrpjN15n1z53wj0
	for <freebsd-multimedia@mlmmj.nyi.freebsd.org>; Thu, 14 Dec 2023 23:39:36 +0000 (UTC)
	(envelope-from christos@freebsd.org)
Received: from margiolis.net (mail.margiolis.net [95.179.159.8])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA512)
	(Client did not present a certificate)
	by mx1.freebsd.org (Postfix) with ESMTPS id 4SrpjM5r4Lz3NhR;
	Thu, 14 Dec 2023 23:39:35 +0000 (UTC)
	(envelope-from christos@freebsd.org)
Authentication-Results: mx1.freebsd.org;
	none
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; s=mail; bh=DPMyMvlL0RGO9Et
	CPUtv7jUH9rjh7fPo6ALzj3NarxQ=; h=in-reply-to:references:subject:cc:to:
	from:date; d=margiolis.net; b=SF3ApjZ7P7Q444rAC9bKqVcLJ7fBdRnWeZBxs8Tn
	SYFHDD9KJVQeDVZD7hx+yIEjAwZif22clM3p1EncUnvz+zCqqES1Gk6KxBiTRH3i+pzKfS
	pedww9kZFWYa20L1dq9vKLNf/OKkhFgpk2Ve5/Jh+LukD9qElw71CT0GcpKqM=
Received: from pleb (ppp-94-66-59-140.home.otenet.gr [94.66.59.140])
	by margiolis.net (OpenSMTPD) with ESMTPSA id a97635e6 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO);
	Thu, 14 Dec 2023 23:39:33 +0000 (UTC)
Date: Fri, 15 Dec 2023 01:39:33 +0200
From: Christos Margiolis <christos@freebsd.org>
To: Baptiste Daroussin <bapt@freebsd.org>
Cc: freebsd-multimedia@freebsd.org
Subject: Re: RFC - Work on FreeBSD's Audio Stack
Message-ID: <lawihgnr6xhhozvq3zyatzr2xts5qgyeh233f7f6242jhf3fae@k4u2fglxt73y>
References: <86ttomxg11.fsf@phe.ftfl.ca>
 <86y1dxpjzy.fsf@phe.ftfl.ca>
 <5gncptsagv7vr6omipmttdel73uq3dx3gvjz3nsvsleqlmqdmu@denmsyow3yzj>
List-Id: Multimedia discussions <freebsd-multimedia.freebsd.org>
List-Archive: https://lists.freebsd.org/archives/freebsd-multimedia
List-Help: <mailto:freebsd-multimedia+help@freebsd.org>
List-Post: <mailto:freebsd-multimedia@freebsd.org>
List-Subscribe: <mailto:freebsd-multimedia+subscribe@freebsd.org>
List-Unsubscribe: <mailto:freebsd-multimedia+unsubscribe@freebsd.org>
Sender: owner-freebsd-multimedia@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <5gncptsagv7vr6omipmttdel73uq3dx3gvjz3nsvsleqlmqdmu@denmsyow3yzj>
X-Rspamd-Pre-Result: action=no action;
	module=replies;
	Message is reply to one we originated
X-Spamd-Result: default: False [-4.00 / 15.00];
	REPLY(-4.00)[];
	ASN(0.00)[asn:20473, ipnet:95.179.144.0/20, country:US]
X-Spamd-Bar: ----
X-Rspamd-Queue-Id: 4SrpjM5r4Lz3NhR

Hello Baptiste,

Baptiste Daroussin wrote:
> Another issue which is painful with uaudio, more and more laptops have
> uaudio devices by default instead of hda, and uaudio is not able to
> suspend/resume if something is consuming it.
> 
> This is the only hotpluggable device we have for snd card, when one is
> going to suspend, the device is being detached not suspended (because
> usb) and the decatch procedure goes through the pcm_unregister
> function which loops forever hoping the application using the device
> will die, which never happens, so suspend ends up in an infinite loop
> in the kernel.
> 
> Note the same happen if you disconnect any uaudio device while an
> application is using it.

Yeap, this is what I was mostly referring to when I wrote "Other USB
audio bugs include 1) those mentioned in the snd uaudio(4) man page". 

Christos