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


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 )

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 
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.


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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