Re: [Xen-users] Intel HD 4000 VGA passthrough not working

[Kristian Hagsted Rasmussen <kristian@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxx] On Behalf Of Howell Tam
> Sent: 1. februar 2013 10:45
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Intel HD 4000 VGA passthrough not working
> 
> 
> 
> > For me it works fine in win7, if I use less the 3G of memory in the
> > DomU and of course qemu-xen-traditional as device model. I have not
> > tried winXP or Linux. It should be said that it will not work if you
> > boot in EFI mode, since the VGA-bios is not  available to the linux
> > kernel.
> 
>       Thanks for your info.
> 
>       So it is a known issue to use more than 3G of memory?
I seem to remember that another user mentioned problems with 4G of memory. I am 
not sure of the amount at which this problem is solved, but you could try with 
more than 3GB to check if it works.

> 
>       How do I make sure I'm not booting the EFI mode? I noticed
> my bios has several settings about UEFI or legacy, and so I should set them 
> all
> to legacy? Is there any other things i should make sure?
Which distro's do you use as dom0? Most distros will not use EFI as default, as 
far as I'm aware.
For a command I cannot remember, but you could check which bootloader you have 
installed, the EFI versions are called something as grub-efi and elilo.

Kind regards Kristian Hagsted Rasmussen

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