Solve the problem that kdprint cannot be output during Windows 7 driver debugging.

For work reasons, you need to debug the PCI driver on win7. I used the dual-host debugging method. I thought it would be very convenient to debug and the environment was quickly set up. But the problem was that I couldn't print it out on windbg on another machine. Later, I searched for the information and saw someone introducing the solution to modify the registry.
Kernel output problems. The specific method is in the Registry HKEY_LOCAL_MACHINE/system/CurrentControlSet/control/Session Manager /.
Create a new key, named debug print filter, and create a New DWORD Value Under this key, named default, and then set the value to 0x00000008,
It takes effect after you restart your computer.
After I restarted my computer, I found that I still didn't print it. After careful troubleshooting, I found that there was a problem with the key of the debug print filter, Because I directly copied it online when I changed the name, some invisible characters may have been copied in (it seems that we still cannot steal it !). Solve the problem after modification.
(Find a tool (setdbuplintfiltering.exe) on the Internet to set the kernel printing level, which is the same as setting the Registry)