From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel =?utf-8?q?Mat=C4=9Bja?= Subject: Re: VGA Passthru HW upgrade Date: Wed, 25 Jan 2012 20:48:44 +0100 Message-ID: <201201252048.44437.pavel@netsafe.cz> References: <201201171115.53993.pavel@netsafe.cz> <201201250926.45689.pavel@netsafe.cz> <20120125161828.GC12984@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120125161828.GC12984@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Wed 25. of January 2012 17:18:28 you wrote: > On Wed, Jan 25, 2012 at 09:26:45AM +0100, Pavel Mateja wrote: > > > I can't hear sound in DomU. Hmm, to be honest I've heard some broken > > > pieces,.. > > > > Problem found: > > You can't load linux ALSA driver before you pass the sound card to the > > virtual machine. Since I removed linux kernel driver Windows play sounds > > just fine. > > Thanks for the update. And that's quite obvious reason.. > naturally you can't use a single PCI device in multiple domains at the same > time. > > PCI passthru *dedicates* the device to specific domain, so it can only be > used in that domain. If dom0 is trying to use it aswell, things will go > wrong. > > -- Pasi I know that. I power down USB controller and rescan PCI because of resource_allignment and I unbind all the devices (USB, VGA, Sound Card) from drivers. Just sound card didn't work well after this. Strange thing is the sound was working on Crosshair IV Formula. I suppose linux driver sets up the card in way Windows can't handle. Funny thing: sound worked in analog in Battlefield 3 but not plain Win7. No single beep from SPDIF. One big WTF? -- Pavel Mateja