驱动开发print无法输出问题

windbg修改 

nt!Kd_DEFAULT_MASK 为4字节 0xffffffff 即可
或者修改注册表
 Created registry key "Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Debug Print Filter" 添加键 DEFAULT, REG_DWORD, ffffffff.  "Debug Print Filter" 如果不存在 直接新建

参考地址:https://social.msdn.microsoft.com/Forums/en-US/01d51409-c749-418f-8c89-ec87c79f169f/local-kernel-windbg-kdprint-dbgprint-not-showing-on-windows-10?forum=wdk