!usbkd.usbportmddevext

The !usbkd.usbportmddevext command displays a usbport!_DEVICE_EXTENSION structure if one is present in a crash dump that was generated as a result Bug Check 0xFE.

!usbkd.usbportmddevext

DLL

Usbkd.dll

Remarks

Use this command only when you are debugging a crash dump file that was generated as a result of Bug Check 0xFE: BUGCODE_USB_DRIVER.

Examples

Here is an example of the output of !usbportmddevext.

1: kd> !analyze -v
*** ...
BUGCODE_USB_DRIVER (fe) 
...
1: kd> !usbkd.usbportmddevext
USBPORT.SYS DEVICE_EXTENSION DATA: 
Hcd FDO Extension:
Sig:4f444648 HFDO
CurrentPnpFunc: 0x00000008
PnpFuncHistoryIdx: 0x0000000d
CurrentPowerFunc: 0x00000000
PowerFuncHistoryIdx: 0x00000000
PnpLogIdx: 0x00000002
IoRequestCount: 0x00000007
IoRequestAsyncCallbackCount: 0xffffffff
IoRequestAllow: 0x00000000
Pnp Func History (idx 13)
...
[02] pnp 13 (0d) IRP_MN_FILTER_RESOURCE_REQUIREMENTS
[...
Power Func History (idx 0)
[01] pnp 255 (ff) ??? (x0) PowerDeviceUnspecified
...
	**Power and Wake -----------------------------------------------
	selective suspend:on (1)
	PowerFlags (00000080):
*---FDO---*
PMDebug: 0x00000000
MinAllocedBw: 0x00000000
MaxAllocedBw: 0x00000000
...
------------------
XDPC HISTORY_UsbHcIntDpc
------------------
State History (idx 2)
EVENT, STATE, NEXT 
Log[3] @ 000000d9e7c615cc  
Ev_Xdpc_Worker       XDPC_DpcQueued          XDPC_Running            
...        
------------------
XDPC HISTORY_UsbDoneDpc
------------------
State History (idx 0)
EVENT, STATE, NEXT 
Log[1] @ 000000d9e7c61774  
Ev_Xdpc_Worker       XDPC_DpcQueued          XDPC_Running            
...          
------------------
XDPC HISTORY_UsbMapDpc
------------------
State History (idx 3)
EVENT, STATE, NEXT 
Log[4] @ 000000d9e7c6196c  
...         
------------------
XDPC HISTORY_UsbIocDpc
------------------
State History (idx 0)
EVENT, STATE, NEXT 
Log[1] @ 000000d9e7c61b04  
Ev_Xdpc_Worker       XDPC_DpcQueued          XDPC_Running            
...           

See also

USB 2.0 Debugger Extensions
Universal Serial Bus (USB) Drivers

 

 

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