[Xen-devel] ATI VGA passthrough and S400 Synchronization module

[Aurélien MILLIAT <Aurelien.MILLIAT@xxxxxxxxxxxxxx>]

>On Tue, Jul 24, 2012 at 04:05:20PM +0000, Aurélien MILLIAT wrote:
>> Hi,
>>
>> I'm currently trying to use XEN on graphical cluster.
>> VGA passtrough works fine and I'm able to use quad-buffer for active stereo.
>> The last thing to do is to synchronize all GPU from the cluster.
>> For this purpose I use ATI FirePro S400 and it didn't works.
>>
>> I've seen two behaviors:
>> -When I run lspci command on Dom0 I've got:
>> 0f:00.0 VGA compatible controller: ATI Technologies Inc Device 6888
>> 0f:00.1 Audio device: ATI Technologies Inc Cypress HDMI Audio [Radeon HD 
>> 5800 Series]
>> And sometimes just
>> 0f:00.0 VGA compatible controller: ATI Technologies Inc Device 6888
>> -When a DomU(Windows 7) is running, it's very slow (I can't do anything) and 
>> crash after several minutes.
>> I've tried with the unstable version and I've seen the same 'lspci' behavior.
>>
>> I've a couple of questions:
>> Is it possible to passthrough a VGA with this extension?
>
>I never tried. I just pass in the VGA card and don't try to pass in the HDMI 
>driver.
>

I've tried this, usually the computer reboot without any informations in logs. 
Sometimes XEN raise an error because the VGA can't be passed.

>> As it's a particular use of VGA passtrough is it planned to able to use 
>> synchronization module?
>
>So what is synchronization module for you? That is the HDMI part?
>

No, as it's an extension that is directly plug on the VGA card, it's seems that 
XEN isn't aware of it.

>> Is it easy to add this feature (time cost)?
>>
>> Computers : HP Z800 workstation
>> GPU: ATI FirePro V8800
>> CPU: Intel Xeon E5640
>> MB: Intel 5520 chipset
>>
>> XEN :
>> Version  4.1.2
>> With ATI patch from 
>> http://old-list-archives.xen.org/archives/html/xen-users/2011-05/msg00048.html
>> Thanks,
>> Aurélien Milliat
>>
>>
>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-devel


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