Re: [Xen-devel] [Xen-users] VGA passthough still not working

[Konrad Rzeszutek Wilk <konrad@xxxxxxxxxx>]

On Mon, Jan 23, 2012 at 02:17:42PM +0100, Tobias Geiger wrote:
> Hello!
> 
> The thing is, you either dont need patches at all to get it to work (ATI), or 
> you need to customize patches reflecting your individual setup (NVIDIA);
> 
> To be more specific:
> I can confirm that passing through a ATI Card works "out of the box" - either 
> to Windows 7 or Windows XP;
> In the past i had a setup running with a NVIDIA card, it only worked with 
> special patches (the ones David packed together and offers as tarball) and - 
> as 
> far as i can tell - are not generaly working for all NVIDIA Cards, i.e. you 
> have to adjust Memory-Adresses in the acpi.dst (iirc). - and even then the 
> passed through Card worked only with Windows XP - NOT with Windows 7;
> 
> Both setup have the "flaw" that they only work once - meaning you can't 
> reboot 
> your DomU , cause after the reboot the passed-through Card doesnt have 
> correct 
> 3D-Accelleration any more (was/is the case with NVIDIA and ATI, Windows XP 
> and 
> Windows7 )

For me it was with ATI with Windows7. Hadn't tried other OSes.

Anybody had luck with passing the card more than once to a guest? With
any random set of patches?
> 
> So - to summarize: It works easiest and most featureful with a ATI Card; 
>                             It may work with patches and only with WindowsXP 
> with an NVIDIA card
> 
> To me it seems that unless someone finds an general approach to 
> runtime-detect 
> the NVIDIA-Secific stuff , submitting any patches may be to early, as it 
> arouses 
> expectations which only in some cases will be met.

> 
> That said - i gladly can forward-port these old patches, if you think they 
> are 
> helping in any way.
> 
> Greetings!
> Tobias
> 
> Am Montag, 23. Januar 2012, 12:39:38 schrieb Ian Campbell:
> > Please do not a) top-post or b) cross-post. The latter being aimed at
> > whoever started this thread.
> > 
> > On Mon, 2012-01-23 at 11:25 +0000, Sandi Romih wrote:
> > > Yeah, I guess xen has generally been focused on the server end.
> > 
> > Xen is focused on whatever people submit patches to do. Many of the core
> > developers are not currently looking at VGA passthrough, we have plenty
> > of stuff on our plates, but we are more than happy to review and accept
> > patches to implement/improve/fix this feature if only those people who
> > are interested in it would take the time to submit them per
> > http://wiki.xen.org/wiki/SubmittingXenPatches . I'm afraid we are not
> > going to go out hunting for patches on the Internet.
> > 
> > David Techer recently offered to do this but perhaps he would be
> > interested in some help from you?
> > 
> > Ian.
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 
> 
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