From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:59788) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gw3Pf-0001FQ-9J for qemu-devel@nongnu.org; Tue, 19 Feb 2019 06:18:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gw3Pd-0006xP-1J for qemu-devel@nongnu.org; Tue, 19 Feb 2019 06:18:11 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46612) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gw3Pc-0006vP-Mi for qemu-devel@nongnu.org; Tue, 19 Feb 2019 06:18:08 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 725FEC007341 for ; Tue, 19 Feb 2019 11:18:07 +0000 (UTC) Date: Tue, 19 Feb 2019 11:17:55 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Message-ID: <20190219111755.GE7154@redhat.com> Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20190219101510.9356-1-kraxel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] [PATCH] audio: don't use alsa by default List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: David Hildenbrand Cc: Gerd Hoffmann , qemu-devel@nongnu.org On Tue, Feb 19, 2019 at 11:39:49AM +0100, David Hildenbrand wrote: > On 19.02.19 11:15, Gerd Hoffmann wrote: > > ardware is present the driver initializes > > successfully and throws errors later on, i.e. effectively the > > automatic probing doesn't work. So the driver should not be > > used by default (until that is fixed). Drop the can_be_default > > flag. > > > > Explicitly picking the alsa driver (using QEMU_AUDIO_DRV=alsa > > environment variable) will continue to work. > > Just pointing out that with this patch, audio initialization still > hinders me from starting guests on my Fedora 29 when running under root > (I don't think this patch was also intended to fix that, just pointing > out for me the problem still exists). > > > ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: > Connection refused > > sdl: SDL_OpenAudio failed > sdl: Reason: ALSA: Couldn't open audio device: Connection refused > ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: > Connection refused > > sdl: SDL_OpenAudio failed > sdl: Reason: ALSA: Couldn't open audio device: Connection refused > audio: Failed to create voice `pcspk' > qemu-system-x86_64: Initialization of device isa-pcspk failed: > Initializing audio voice failed > > > For whatever reason, on my Fedora29 root cannot access alsa devices. > Maybe it is a Fedora 29 problem, maybe only my setup is messed up (e.g. > because of an upgrade). The workaround for me is to not run QEMU as > root. (I don't have time to look into the details) Does your machine actually have any sound card in it ? ie does /dev/snd/ report any pcm* devices ? Based on your logs here, I suspect it has no sound card. The reason it will work as non-root, is that QEMU will activate the pulseaudio backend that works fine [1] even if no sound card is present. Regards, Daniel [1] by "fine" I mean it'll happily accept the audio stream from the app and send it to /dev/null :-) -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|