Where is your survey? I had the wake from sleep issue about 2 weeks after purchasing my Pro 4 last December. I kept a log of when it occurred and what I had to do to wake it up. You can see the frequency was much greater before the Feb. updates. I have not
had one wake problem since March.
Here is my log:
12/29/15 - PC went to sleep. When I tried to wake it up I get the black screen with the mouse pointer only. Power screen off and it is dark black. Power on and it is dark blue but nothing on the screen. When I hold the power button I get part of the logon
screen saying to swipe down to reboot. Swipe down and the screen goes black and it does not power off. I had to hole down the power button for 30 seconds to reboot. Then all is fine again.
1/1/2016 at 6pm. Removed the keyboard from tablet then tried to wake the tablet. Got the problem described above from 12/29.
1/9/2016 Had the same problem as 12/29 after putting the pc to sleep and then a few minutes later trying to use it.
1/13/2016 Screen did not wake up but I pressed ctrl-alt-del and got the logon screen and was able to sign in. Screen was ok after that.
Screen would not wake up again and this time I had to power off/on
1/16/16 - Had the same problem as on 12/29 but when I press Ctrl-alt-del I can login and everything is fine.
1/17/16 same issue as 12/29. ctrl-alt-del lets me login and screen comes back.
1/18/16 I closed the lid after putting sp4 to sleep via power button. Returned after over an hour and could not bring screen back. Had to power off/on.
This happened again today where I had to power off/on.
1/19/16 Had to reboot this morning to get screen back.
1/20/16 Updated the Intel HD520 device driver per instructions on the forum.
1/28/16 touch screen stops working and i have to reboot to get it back.
1/30/16 same as 1/28 with touchscreen stops working
2/2/16 had the not wake from sleep with just the mouse pointer. Ctrl-alt-del got me in. 1st time this has happened since updating the device driver.
I am not sure I still have the updated device driver so I updated it again.
2/5/ had blank screen with arrow only. ctrl-alt-del fixes
2/10/16 updated display driver to new beta
3/27/16 Pressed a key to wake up the sp4 and I got the black screen with just mouse pointer. ctrl-alt-del allowed me to login.