LDDM Graphics Subsystem (DXGKrnl) Service Defaults in Windows 7

Controls the underlying video driver stacks to provide fully-featured display capabilities.

Default Settings

Startup type:Manual
Display name:LDDM Graphics Subsystem
Service name:DXGKrnl
Service type:kernel
Error control:ignore
Group:Video Init
Path:%SystemRoot%\System32\drivers\dxgkrnl.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DXGKrnl

Default Behavior

LDDM Graphics Subsystem is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If LDDM Graphics Subsystem fails to load or initialize, Windows 7 startup continues without error messages. The failure details are being written into Event Log.

Restore Default Startup Configuration for LDDM Graphics Subsystem

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config DXGKrnl start= demand

3. Close the command window and restart the computer.

The DXGKrnl service is using the dxgkrnl.sys file that is located in the %WinDir%\System32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.