WMI InstanceCreationEvent not fired after windows hibernate

Question

I create two handlers to receive USB device plug/unplug events, similar to this answer.

private void RegisterUSBEvents()
{
    WqlEventQuery insertQuery = new WqlEventQuery("SELECT * FROM __InstanceCreationEvent WITHIN 2 WHERE TargetInstance ISA 'Win32_PnPEntity'");
    ManagementEventWatcher insertWatcher = new ManagementEventWatcher(insertQuery);
    insertWatcher.EventArrived += new EventArrivedEventHandler(DeviceInsertedEvent);
    insertWatcher.Start();
    WqlEventQuery removeQuery = new WqlEventQuery("SELECT * FROM __InstanceDeletionEvent WITHIN 2 WHERE TargetInstance ISA 'Win32_PnPEntity'");
    ManagementEventWatcher removeWatcher = new ManagementEventWatcher(removeQuery);
    removeWatcher.EventArrived += new EventArrivedEventHandler(DeviceRemovedEvent);
    removeWatcher.Start();
}

I could receive any USB plug or unplug event using above code.

For most PCs, after windows wake up from hibernation, my app will receive a InstanceDeletionEvent, following by a InstanceCreationEvent for a USB device.

However, on few computers, after windows hibernates and wakes up, I could only receive a InstanceDeletionEvent, but no InstanceCreationEvent for the same device. The USB device is leaved on the USB port untouched.

If I close and restart my app, or unplug/plug the same device, the above code becomes working again.

Is there any problem causing a USB device fire InstanceDeletionEvent but not fire InstanceCreationEvent after hibernation in certain environment?

score 0 · Answer 1 · answered Apr 19 '18 at 09:28

0

There's a registry entry called ResetOnResume which will force the USB driver stack to reset the device on wake. It's disabled by default which would explain the issue your having after waking from hibernation on some PC's.

ResetOnResume

Indicates whether the USB driver stack must reset the device when the port resumes from a sleep cycle.

answered Apr 19 '18 at 09:28

Kitson88

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I checked one of the problematic PC. The registry entry of usb device does not contain a `ResetOnResume` entry. – Dia Apr 19 '18 at 10:09
You create it as per the article. – Kitson88 Apr 19 '18 at 10:10

score 0 · Accepted Answer · answered Apr 20 '18 at 05:31

I found the answer, but seems not software-related.

On those problematic PC, if the USB device is plugged at the USB port directly on the motherboard, the InstanceDeletionEvent and InstanceCreationEvent would fire properly after wake from hibernation, at over 95% working chance.

If the USB device is plugged at front panel USB port, there is about 75% chance that InstanceCreationEvent will not fire after wake.

Maybe it is a faulty hardware issue.

WMI InstanceCreationEvent not fired after windows hibernate

2 Answers2