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!usbkd.usbhubs

The !usbkd.usbhubs command displays information about USB hubs.

!usbkd.usbhubs a[v]
!usbkd.usbhubs x[v]
!usbkd.usbhubs r[v]

Parameters

a
Display all hubs.

r
Display root hubs.

x
Display external hubs.

v
The output is verbose. For example, !usbhubs rv displays verbose output about all root hubs.

DLL

Usbkd.dll

Examples

Here is an example of verbose output from the !usbhubs command.

0: kd> !usbkd.usbhubs rv

args 'rv'
level: r v
ROOT HUBS
*LIST -- Root Hub List @ fffff8000217f440
*flink, blink ffffe000023215c0,ffffe000011f85c0
----------

[0] entry @: ffffe000023201a0
    !DevObj ffffe00002320050 !usbhubext ffffe000023201a0 
On Host Controller (0x8086, 0x293c) 
        Stat_AsyncResumeStartAt: 2437ee39d29bd498
        Stat_AsyncResumeCompleteAt: 24413c77d29bd498
        Stat_AsyncResume: 0x3c(60) ms
        Stat_SyncResumeStartAt: 2437ee39d29bd498
        Stat_SyncResumeCompleteAt: 2437ee39d29bd498
        Stat_SyncResume: 0x0(0) ms
Trap Regs: Event, Port, Event (ffffe000023204d0) 
    Enable: 0 Port: 0 Event 00000000
Hub Number: # 3
Number Of Ports: 4
dt usbhub!_USBHUB_FDO_FLAGS ffffe00002320ba0
>Is Root
>Power Switching: 
     No Power Switching 
>Overcurrent: 
     Global Overcurrent 
>PortIndicators: 
     No PortIndicators present
>AllowWakeOnConnect: 
     DO NOT WakeOnConnect
>CURRENT Hub Wake on Connectstate: 
     HWC_DISARM:- do not wake system on connect/disconnect event
>CURRENT Bus Wake state: 
     BUS_DISARM:- bus not armed for wake by this hub
>CURRENT Wake Detect state (WW Irp): 
     HUB_DISARM:- no ww irp pending (HUB_WAKESTATE_DISARMED)
Milliamps/Port : 500ma
Power caps (0 = not reported)
     PortPower_Registry : 0
     PortPower_DeviceStatus : 500
     PortPower_CfgDescriptor : 500
##      PortPower_HubStatus : 500

----------

[1] entry @: ffffe000008b91a0
    !DevObj ffffe000008b9050 !usbhubext ffffe000008b91a0 
On Host Controller (0x8086, 0x2937) 
...

See also

USB 2.0 Debugger Extensions

Universal Serial Bus (USB) Drivers