0: kd> !devstack ffffd509639c7d60
!DevObj !DrvObj !DevExt ObjectName
ffffd509608a77f0 \Driver\ksthunk ffffd509608a7940 InfoMask field not found for _OBJECT_HEADER at ffffd509608a77c0
ffffd50964016050 Unable to load image RTKVHD64.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for RTKVHD64.sys
\Driver\IntcAzAudAddServiceffffd509640161a0 InfoMask field not found for _OBJECT_HEADER at ffffd50964016020
> ffffd509639c7d60 \Driver\HDAudBus ffffd509608a09a0 Cannot read info offset from nt!ObpInfoMaskToOffset
!DevNode ffffd50964006c30 :
DeviceInst is "HDAUDIO\FUNC_01&VEN_10EC&DEV_0294&SUBSYS_104312CF&REV_1000\5&132953ad&0&0001"
ServiceName is "IntcAzAudAddService"