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