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 08:19:21 +0200 Message-ID: <4DF065E9.4070605@web.de> References: <4DEF17C1.7000805@web.de> <4DEF6FC9.8040209@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: "kvm@vger.kernel.org" To: Gerd Hoffmann Return-path: Received: from fmmailgate03.web.de ([217.72.192.234]:36251 "EHLO fmmailgate03.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751198Ab1FIGT2 (ORCPT ); Thu, 9 Jun 2011 02:19:28 -0400 In-Reply-To: <4DEF6FC9.8040209@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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 tri= ed, >> did not even start playing the sound file, although they detected th= e >> DirectSound Device. > > iso xfer's from usb-linux via ehci are flaky for reasons not yet trac= ked > 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 very=20 convincing. When playing mp3s inside the VM, I could hear music coming=20 from the speakers, but the sound was very choppy and too slow. It was n= o=20 joy listening to it. I assumed that it may be a clocking issue, since the man page for qemu=20 lists the module paramter "clocking=3D48000" for the i810_audio driver.= =20 The snd_hda_intel module however does not seem to have such a parameter= =2E I then double checked whether playing an mp3 works on the server, rathe= r=20 than from inside the VM. I used mpg123 to test it and mp3s play without= =20 distortion on the machine. Regards Andr=E9