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The !usbkd.usbhubext command displays information about a USB hub.
!usbkd.usbhubext DeviceExtension
Parameters
DeviceExtension
Address of one of the following:
- The device extension for the functional device object (FDO) of a USB hub.
- The device extension for the physical device object (PDO) of a device that is connected to a USB hub.
DLL
Usbkd.dll
Examples
Here is one way to find the address of the device extension for the FDO of USB hub. First enter !usbkd.usb2tree.
0: kd> !usbkd.usb2tree
...
2)!ehci_info ffffe00001ca11a0 !devobj ffffe00001ca1050 PCI: VendorId 8086 DeviceId 293c RevisionId 0002
RootHub !hub2_info ffffe000023201a0 !devstack ffffe00002320050
In the preceding output, you can see the suggested command !devstack ffffe00002320050. Enter this command.
0: kd> !kdexts.devstack ffffe00002320050
!DevObj !DrvObj !DevExt ObjectName
> ffffe00002320050 \Driver\usbhub ffffe000023201a0 0000002d
ffffe0000213c050 \Driver\usbehci ffffe0000213c1a0 USBPDO-3
...
In the preceding output, you can see that the address of the device extension for the FDO of the hub is ffffe000023201a0.
Now pass the address of the device extension to the !usbkd.usbhubext command.
0: kd> !usbkd.usbhubext ffffe000023201a0
FDO ffffe00002320050 PDO ffffe0000213c050 HubNumber# 3
dt USBHUB!_DEVICE_EXTENSION_HUB ffffe000023201a0
!usbhublog ffffe000023201a0
RemoveLock ffffe00002320668
FdoFlags ffffe00002320ba0
CurrentPowerIrp: System (0000000000000000) Device (0000000000000000)
ObjReferenceList: !usblist ffffe00002320b70, RL
ExceptionList: !usblist ffffe00002321498, EL [Empty]
DmTimerListHead: !usblist ffffe00002321040, TL [Empty]
PdoRemovedListHead: !usblist ffffe00002321478, PL [Empty]
PdoPresentListHead: !usblist ffffe00002321468, PL
WorkItemListHead: !usblist ffffe00002320c80, WI [Empty]
SshBusyListHead: !usblist ffffe00002320dc0, BL
## PnP FUNC HISTORY (latest at bottom)
01. IRP_MN_QUERY_DEVICE_RELATIONS
...
## POWER FUNC HISTORY (latest at bottom)
01. IRP_MN_QUERY_POWER - PowerSystemHibernate
...
## HARD RESET STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. HRE_Pause HReset_WaitReady HReset_Paused
...
## PNP STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. Ev_SYSTEM_POWER FDO_WaitPnpStop FDO_WaitPnpStop
...
## POWER STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. Ev_SET_POWER_S0 FdoSx_Dx FdoWaitS0IoComplete_Dx
...
## BUS STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. BE_BusSuspend BS_BusPause BS_BusSuspend
...
SSH_EnabledStatus: [SSH_ENABLED_VIA_POWER_POLICY]
## SSH STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. SSH_Event_ResumeHubComplete SSH_State_HubPendingResume SSH_State_HubActive
...
## PORT DATA
PortData 1: !port2_info ffffe000021bf000 Port State = PS_WAIT_CONNECT PortChangeLock: 0, Pcq_State: Pcq_Run_Idle
PDO 0000000000000000
...
Here is one way to find the address of the device extension for the PDO of a device that is connected to a USB hub. First enter !usbkd.usb2tree.
0: kd> !usbkd.usb2tree
...
2)!ehci_info ffffe00001ca11a0 !devobj ffffe00001ca1050 PCI: VendorId 8086 DeviceId 293c RevisionId 0002
RootHub !hub2_info ffffe000023201a0 !devstack ffffe00002320050
Port 1: !port2_info ffffe000021bf000
Port 2: !port2_info ffffe000021bfb40
Port 3: !port2_info ffffe000021c0680 !devstack ffffe00007c882a0
In the preceding output, you can see suggested command !devstack ffffe00007c882a0. Enter this command.
0: kd> !kdexts.devstack ffffe00007c882a0
!DevObj !DrvObj !DevExt ObjectName
ffffe00006ce2260 \Driver\USBSTOR ffffe00006ce23b0 00000070
> ffffe00007c882a0 \Driver\usbhub ffffe00007c883f0 USBPDO-4
...
In the preceding output, you can see that the address of the device extension for the PDO of the device is ffffe00007c883f0.
Now pass the address of the device extension to the !usbhcdpnp command.
0: kd> !usbkd.usbhubext ffffe00007c883f0
dt USBHUB!_DEVICE_EXTENSION_PDO ffffe00007c883f0
PARENT HUB: FDO ffffe00002320050 !hub2_info ffffe000023201a0
!usbhubinfo ffffe00002320050
PORT NUMBER : 3
IoList: !usblist ffffe00007c888b0, IO
LatchList: !usblist ffffe00007c888e0, LA
## PnP ID's
DeviceId:USB\VID_0781&PID_5530
HardwareId:USB\VID_0781&PID_5530&REV_0100USB\VID_0781&PID_5530
CompatibleId:USB\Class_08&SubClass_06&Prot_50USB\Class_08&SubClass_06USB\Class_08
SerialNumberId:20052444100A47F319CB
UniqueId:3
ProductId:Cruzer
## Pnp Func History (latest at bottom)
01. IRP_MN_QUERY_BUS_INFORMATION
...
## Power Func History (latest at bottom)
## PNP STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. (6) (0) PDO_WaitPnpStart
02. Ev_PDO_IRP_MN_START PDO_WaitPnpStart PDO_WaitPnpStop
## POWER STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
[EMPTY]
## HARDWARE STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
01. PdoEv_CreatePdo (0) Pdo_Created
02. PdoEv_RegisterPdo Pdo_Created Pdo_HwPresent
03. PdoEv_QBR Pdo_HwPresent Pdo_PnpRefHwPresent
## IDLE STATE HISTORY (latest at bottom)
## EVENT STATE NEXT
[EMPTY]