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Re: [Xen-users] Advice on PCIe graphics card for Xen+X86_64 for X

To: Luis Torres <luis.torres@xxxxxxxxx>
Subject: Re: [Xen-users] Advice on PCIe graphics card for Xen+X86_64 for X
From: Christian Horn <chorn@xxxxxxxxxxxx>
Date: Mon, 13 Aug 2007 16:09:30 +0200
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On Mon, Aug 13, 2007 at 12:33:55PM +0100, Luis Torres wrote:
> 
> I used a ScienticLinux 5.0 distro (mimics RedHat 5.0 but merged the 
> Server and Enterprise versions) in a x86_64 arch. I ran into a problem, 
> because while I can have X in the normal kernel, the Xen kernel, when I 
> boot in dom0 is in text mode and can't load the Nvidia module. This is 
> because Nvidia does not support Xen. There seems to be some patches for 
> other distros (Suse, freeBSD) but I am afraid those might not work here 
> ... anyway I want to avoid this.
Havent tried with x86_64 but for i386 the patch at
http://fluxcoil.net/files/NVIDIA-Linux-x86-1.0-9746-pkg1_xendom0.patch
should do for any distro, kernel 2.6.18 running here.


> 2) Is there a way that I could have both graphic cards installed so I 
> could use the more powerful one when I boot with the normal kernel and 
> the new one for Xen+X, when booting under the Xen kernel?
Guess the intel-chipsets with 3d-functions should work best under xen,
i am not aware of external (not included into motherboard chipset) graphic
cards with intel-chips thou. And they are a bit slower than decent nvidia
and ati-chips, but its enough for compbiz and some games.


> Regarding question 2), note that what I want to do is slightly different 
> from what was discussed in the forum earlier. That is  only 1 card would 
> be used for each booting configuration (but both would be physically in 
> the system)
Read on people trying to dedicate pci-cards to domUs, but havent really
heard success-stories yet.


Christian

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