Re: Is my Intel HD Graphics 4600 Xen VGA Passthrough to Windows 8 Enterprise HVM domU Considered Successful?

["Singapore Citizen Mr. Teo En Ming (Zhang Enming)" <singapore.mr.teo.en.ming@gmail.com>]

On 19/07/2013 19:02, Gordan Bobic wrote:
> On Fri, 19 Jul 2013 18:56:24 +0800, "Singapore Citizen Mr. Teo En Ming 
> (Zhang Enming)" <singapore.mr.teo.en.ming@gmail.com> wrote:
>> On 19/07/2013 18:42, Gordan Bobic wrote:
>>> On Fri, 19 Jul 2013 18:27:07 +0800, "Singapore Citizen Mr. Teo En 
>>> Ming (Zhang Enming)" <singapore.mr.teo.en.ming@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> My Windows 8 Enterprise HVM domU configuration is as follows. I have
>>>> to *disable* gfx_passthru, that is, gfx_passthru=0. Please take note.
>>>
>>> [...]
>>>
>>>> So is my Intel HD Graphics 4600 Xen VGA passthrough to Windows 8
>>>> Enterprise HVM domU considered successful?
>>>
>>> If it works, it's successful.
>>>
>>>> I cannot enable gfx_passthru, that is, gfx_passthru=1. If I enable
>>>> gfx_passthru, Windows 8 Enterprise HVM domU would start for a few
>>>> seconds, then the LCD monitor would go into power save mode (blank
>>>> screen) *forever*.
>>>>
>>>> Please advise me on how I can get VGA passthrough to work with
>>>> gfx_passthru=1.
>>>
>>> Can you elaborate why exactly do you need to have that GPU passed
>>> through as primary? Primary GPU passthrough has always been
>>> problematic because domU has to re-post the card's BIOS which
>>> has always been problematic.
>>>
>>> The only difference in the general case is that with gfx_passthru=1
>>> you get to see the POST and boot information on the monitor
>>> connected to the GPU. With gfx_passthry=0 you can only see this
>>> in the VNC session connected to the virtual primary VGA card. In
>>> the vast majority of cases seeing the POST and boot animation
>>> isn't useful enough to be worth bothering with.
>>>
>>> I have a working setup with 2x Quadro cards, each passed through
>>> as secondary (gfx_passthru=0) to different domUs, with separate
>>> mice/keyboards passed through to each domU (multi-seat gaming
>>> rig), and that works lovely (only limitation being 2GB of RAM
>>> for each domU until I get around to upgrading to 4.3).
>>>
>>> Unless you have a very compelling reason to use gfx_passthru=1
>>> I suggest you don't bother even trying.
>>>
>>> Gordan
>>>
>>
>> Dear Gordan,
>>
>> I want to use the monitor connected to Intel HD Graphics 4600
>> directly. I don't want to use a VNC session to connect to the Windows
>> 8 Enterprise HVM domU.
>>
>> Thank you very much.
>
> You only need VNC for the POST. Once Windows boots up you should be
> be able to get all your display output on the physical screen.
> Disable the virtual VGA interface in device manager if you have
> to - I've found that is sometimes necessary to get the physical
> GPU working properly.
>
> Gordan
>

Dear Gordan,

How do I disable the virtual display adapter in Windows 8 Enterprise HVM 
domU? I see nothing on the physical screen at all.

Thank you very much.

-- 
Yours sincerely,

Singapore Citizen Mr. Teo En Ming (Zhang Enming)