From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Andr=E9_Weidemann?= Subject: Re: assigned EHCI USB headset not working Date: Thu, 09 Jun 2011 09:08:50 +0200 Message-ID: <4DF07182.3060003@web.de> References: <4DEF17C1.7000805@web.de> <4DEF6FC9.8040209@redhat.com> <4DF065E9.4070605@web.de> <4DF06DED.7030604@web.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Gerd Hoffmann , "kvm@vger.kernel.org" To: Jan Kiszka Return-path: Received: from fmmailgate02.web.de ([217.72.192.227]:60950 "EHLO fmmailgate02.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756153Ab1FIHIy (ORCPT ); Thu, 9 Jun 2011 03:08:54 -0400 In-Reply-To: <4DF06DED.7030604@web.de> Sender: kvm-owner@vger.kernel.org List-ID: Hi Jan, On 09.06.2011 08:53, Jan Kiszka wrote: > On 2011-06-09 08:19, Andr=E9 Weidemann wrote: >> Hi Gerd, >> >> On 08.06.2011 14:49, Gerd Hoffmann wrote: >>> Hi, >>> >>>> The sound device shows up under Windows7 and drivers are installed >>>> automatically. Unfortunately it does not work. All the players I t= ried, >>>> did not even start playing the sound file, although they detected = the >>>> DirectSound Device. >>> >>> iso xfer's from usb-linux via ehci are flaky for reasons not yet tr= acked >>> down. >>> >>> Any reason why you don't just plug in a virtual sound card? The HDA >>> emulation should work fine with win7. >> >> Using the hda driver was my first attempt. But the result was not ve= ry >> convincing. When playing mp3s inside the VM, I could hear music comi= ng >> from the speakers, but the sound was very choppy and too slow. It wa= s no >> joy listening to it. > > Does "export QEMU_AUDIO_DAC_TRY_POLL=3D0" before invoking qemu helps?= It > depends on your host-side interface. Using ALSA here, it is generally > required. > > Note that this discussion rather belongs on qemu-devel. Thank you very much. Setting the variable did the trick. Could this perhaps be included in the man page? I am sure there will be= =20 others who will eventually run into the same problem as I did. Regards Andr=E9