Computer won't sleep; "Driver WSDScan stopped the power transition"

Eksy61 · 21 Jan 2017

Lately, whenever I sleep my desktop PC, it wakes up again almost immediately.

I checked the Event Viewer and found this every time right after the computer tries to go to sleep:

"The driver \Driver\WSDScan for device SWD\DAFWSDProvider\urn:uuid:e3248000-80ce-11db-8000-34238763972f/uri:e3248000-80ce-11db-8000-34238763972f/ScannerService stopped the power transition."

Apparently, this is a driver for something called the WSD Print Provider, which in Device Manager has an entry for my printer, a Brother MFC-J450DW. I tried to disable this driver. I could still print to the printer (since it's on my LAN), but disabling the driver didn't keep the computer from awakening right after it goes to sleep.

Why do I need WSD Print Provider anyway? Can I get rid of it safely somehow?
And how about the driver file itself, C:\Windows\System32\drivers\WSDScan.sys ? Can I safely delete it or rename it?

Caledon Ken · 22 Jan 2017

I believe you will find that WSDScan is for scanning which your Brothers printer likely has the capability to do. Likely it thinks someone has pressed scan and so computer is waking up, at least that is what it thinks it is seeing.

I would head to the Brothers site and check for updated firmware, software and updated drivers for the scan and printer.

After updating any necessary items I would power down Printer and router to ensure any extraneous requests are not coming from either to wake up. (Updating firmware has associated risks, may be last thing you want to do.)

On the next wake up I would enter Command Prompt(admin)

powercfg -lastwake

and see who the gremiln was. There are commands with powercfg to disable a device's ability to wake a system.

Eksy61 · 22 Jan 2017

I can scan even with that driver disabled.

The Device Manager shows that it's part of "WSD Print Provider," which is part of Web Services for Devices (WSD).

But I'm not letting clients access my printer or computer over the Internet--so why would I ever need that?

Caledon Ken · 23 Jan 2017

Looking at it online I can't imagine why it would be waking your device. That is not normal. At least if you disable and you know you've done it, then you can always undo.

Would still be interested to see what Powercfg reports.

Eksy61 · 23 Jan 2017

A google search has revealed that other users have found the same problem on occasion.

But I'm pretty sure I found the underlying cause and solution.

A month ago, I installed the updated driver. And looking in Devices and Printers\Printer Properties, it showed that it created a second copy of the device: "MFC-J450DW" (on a TCP/IP port) and "MFC-J450DW (Copy 1)" on a WSD port.

So I deleted the second copy, uninstalled the drivers, and then reinstalled them again. Voila! No second copy on a WSD port, and everything is back to normal with printing and computer sleeping. From now on, I'll make a System Restore checkpoing and uninstall the old drivers before I install any updated drivers.

Sorry, I can't run powercfg -lastwake anymore because I had to reboot after installing the new drivers.

So, I think we can mark this issue as solved !