Do you want to switch to tablet mode?

This is happening to me, too. In my case I will be in desktop mode and it will randomly switch to tablet mode. It does seem to happen more often when I launch a PC game that uses full-screen mode. Note that whenever I launch that PC game the monitor will always blank out for a few seconds with the message "no signal detected" before it comes back with the game screen.

It also sometimes happens when I first start up the PC.

I have the Surface Book, the Surface dock, a USB keyboard (to the dock), the Arc Mouse (Bluetooth) and an external monitor connected via DisplayPort-HDMI dongle (from Microsoft) to the dock. I also have a Jabra Bluetooth headset plugged into the dock for USB charging.

I've set feedback to automatic and diagnostics to full in the hope that Microsoft will get the data it needs to fix this. Hopefully that will arrive soon. It is very annoying.

Hello all

Please report your experiences after installing the latest Windows 10 updates.

Also, please tell us more about events preceding this behavior.  Was Surface mobile recently?  Does use of a certain accessory, activity or app seem to lead to this?

Thank you for providing feedback.

Best regards 

Just happened again. This time while I was literally doing nothing. I had just booted up the Surface Book, and left it alone while I handled some paper work. After sitting there idle (and perfectly still) on my desk with no apps running, the alert just appeared. Only happened once this time.

Hello all

Please report your experiences after installing the latest Windows 10 updates.

Also, please tell us more about events preceding this behavior.  Was Surface mobile recently?  Does use of a certain accessory, activity or app seem to lead to this?

Thank you for providing feedback.

Best regards 

Just happened again. This time right after I clicked to launch Photoshop CC 2015 (while the splash screen was still open). Just once this time.

I clicked to open it using an external wireless mouse, so once again, the Surface Book was still on the table.

I'm convinced this issue has nothing to do with the connector pins between the base and the device as (once again) the wireless mouse is connected via a USB dongle that's plugged into the Dock that's plugged into the base, and mouse movement was never interrupted.

Really seems random (which I know is impossible to troubleshoot)... Maybe there are some voltage irregularities causing the sensor that's supposed to trigger tablet mode to act up? It might be possible that the sudden extra power draw from the CPU while launching PS did this? I don't know. I just hope you've got devices at MS that do this from time to time which have some extra debugging logging going on so that you can track down the cause.

Interestingly enough, it just happened again while launching Photoshop CC 2015. Closed and re-opened to see if that would trigger it again but it didn't, so it's not consistant. Maybe it has something to do with engaging or disengaging the dGPU in the base?

Just happened again while launching Steam.... at least today, it seems more prone to happen during initial program launches.