History
    
    I have 100% success in Xen VGA Passthrough with Xen 3.5-unstable
    with my first Palit NVIDIA Geforce 8400 GS VGA card in 2009, which
    is 3 years ago. Then my first Palit NVIDIA Geforce 8400 GS VGA card
    overheated and malfunctioned. So I bought a 2nd Palit NVIDIA Geforce
    8400 GS VGA card several months ago in March 2012 for S$44, to
    replace the first card. At that point in time, Xen was already of
    version 4.2-unstable. I have tried to passthrough my 2nd Palit
    NVIDIA Geforce 8400 GS, which is only partially working, or partial
    success. 
In Windows 8 HVM domU, you will see a yellow triangle
      with exclamation mark and error code 43 in Device Manager for the
      2nd Palit NVIDIA Geforce 8400 GS. In Windows XP Home Edition HVM
      domU, you will see a yellow circle with exclamation mark and error
      code 10 in Device Manager for the 2nd Palit NVIDIA Geforce 8400
      GS.
    
    Then I noticed Jean David Techer uses a Geforce 560 Ti for his Xen
    VGA Passthrough. So 1-2 weeks ago I bought a EVGA Geforce GTX 560 1
    GB GDDR5 for S$269. Same thing. Xen VGA Passthrough is only
    partially working or partial success. So I went back to the computer
    shop and exchanged my EVGA Geforce GTX 560 with a Gigabyte Geforce
    GTX 560 1 GB GDDR5, which costs S$289. Again, Xen VGA Passthrough is
    only partially working or partial success. 
In Windows 8 HVM
      domU, you will see a yellow triangle with exclamation mark and
      error code 43 in Device Manager for the Gigabyte Geforce GTX 560.
      In Windows XP Home Edition HVM domU, you will see a yellow circle
      with exclamation mark and error code 10 in Device Manager for the
      Gigabyte Geforce GTX 560.
    
    The Challenge
    
    My computer hardware specifications:
    
    Processor: Intel Pentium Dual Core E2300 @ 2.8 GHz
    Motherboard: Intel DQ45CB Desktop Board with VT-d enabled
    VGA Card: Gigabyte Geforce GTX 560 1 GB GDDR5
    Memory: 6 GB
    
    My computer software specifications:
    
    Host operating system: Ubuntu 12.04.1 LTS Desktop Linux
    Xen Hypervisor version: (a) Xen 4.2-unstable Changeset 25099 (b) Xen
    4.2.1-pre (c) Xen 4.3-unstable Changeset 25993
    Linux Dom0 Kernel: (a) 3.5.4 (b) 3.6.0-rc7
    Windows HVM domU: (a) Windows XP Home Edition SP3 (b) Windows 8
    Release Preview 64-bit
    
    Manuals which I have followed in getting Xen VGA Passthrough done:
    
    (1)
http://wiki.xen.org/wiki/Building_and_Installing_Xen_4.x_and_Linux_Kernel_3.x_on_Ubuntu_and_Debian_Linux
    
    (2)
http://wiki.xen.org/wiki/Xen_VGA_Passthrough_to_Windows_8_with_Xen_4.2-unstable
    
    The above 2 are manuals which I have written myself, after studying
    several Xen Wiki Pages and Jean David Techer's notes.
    
    Now, the above 2 manuals are the same manuals which I have used to
    obtain 100% success in Xen VGA Passthrough for Frank Lyon's NVIDIA
    Quadro 6000. Yes, 100% success. Absolutely no yellow triangle with
    exclamation mark and error code 43 in Windows 7 and Windows 8 HVM
    domU. It is an irony and a joke that, with the same set of manuals
    which I have written, I cannot get 100% success in Xen VGA
    Passthrough with my very own display cards. Frank Lyon's NVIDIA
    Quadro 6000 costs S$6000++, and I can't afford it. 
    
    So now, the problem stands. I get a yellow triangle with exclamation
    mark and error code 43 in device manager for Gigabyte Geforce GTX
    560 in Windows 8 HVM domU and a yellow circle with exclamation mark
    and error code 10 in device manager for Gigabyte Geforce GTX 560 in
    Windows XP Home Edition HVM domU.
    
    
The Reward
    
    1. USD$50 in cash
    2. Palit NVIDIA Geforce 8400 GS PCI Express x16 VGA card (costs
    S$44)
    
    
How to Get the Reward
    
    If I can say that you have solved my Xen VGA Passthrough problem
    100%, you get the reward! Basically, the idea is to get rid of the
    yellow triangle with exclamation mark and error code 43 in Windows 8
    HVM domU and the yellow circle with exclamation mark and error code
    10 in Windows XP HVM domU.
    
    Hence,
    
    (1) If you can tell me off-hand the solution which leads to my Xen
    VGA Passthrough problem being solved 100%, you get the reward. OR
    
    (2) You have spotted mistakes or errors in the manuals which I have
    written, leading to my Xen VGA Passthrough problem being solved
    100%. You get the reward. OR
    
    (3) You have a VT-d capable motherboard and processor, and a
    compatible NVIDIA Geforce GTX 560 like mine, and follows the 2
    manuals which I have written for your Xen VGA Passthrough needs. If
    you can obtain 100% success, please tell me the mistakes or errors
    in my manuals, which leads to my Xen VGA Passthrough problem being
    solved 100%. You get the reward.
    
    
100% success means no error code 43 and no error code 10.
    
    For a start, you may follow the thread series "
Help
        Needed from Xen Developers: Nasty Yellow Triangle with
        Exclamation Mark and Error Code 43 in Device Manager in Windows
        8 HVM domU" in the xen-users and xen-devel mailing lists.
    
    Please note that the prize money of US$50 is guaranteed and there is
    only one winner. There is no closing date for this challenge.
    
    
    
-- 
Yours sincerely,
Mr. Teo En Ming (Zhang Enming)
Singapore