Surface Pro 4 - Screen won't wake from sleep

3. I don't know for sure if this is related, but in the past two weeks, I've lost touchscreen(and pen) access two or three times.  It comes back after a reboot, but at least once, it came back after several wake cycles WITHOUT a reboot.  (Nothing shows as wrong in Device Manager.) This is my biggest concern now, as it makes OneNote effectively useless and again you're left with forced poweroff as the only option if you don't have a Type Cover with you...

^This. I'm on my third SP4 now (touchscreen failure on the first, complete loss of SSD on the second) and on my second day of using the replacement, I lost touch and pen just as you described, after waking from hibernation. Suspending and resuming brought the screen back. Right now I'm debating with myself whether I should return this replacement as well, or if this is a software regression that will hopefully be fixed soon™.

My patience is running low...

Mine had that problem,  and the issue of locking up when I first got it. After about a month, when it had downloaded several updates, those problems disappeared.

OH NO!  IT'S BACK!  I guess any more than about three months without the Intel/Microsoft Power Management Monkeys screwing up my computer was too much to ask...

Things were *finally* starting to work mostly as they should, and I hadn't had to do the YAPORRAC dance (Yet Another Power-Off, Reboot, Restart Apps Cycle) for weeks.  Unfortunately, this week's update has my SP4 failing to wake about once a day - so far, it's always been when docked, but I haven't done much out of the office this week, so it hasn't had much chance to fail to wake when undocked.

I'm currently at 14393.576, and for the first time in a long time, I'm back to at least daily failures to wake.  I'm not actually sure if the offending release is KB3206632 (the most recent one), or the previous one, KB3201845, which was replaced by KB3206632 in only three days.

Anyway, after being pretty stable for a long time, this is definitely broken again.  Who else is having this problem again?

OH NO!  IT'S BACK!  I guess any more than about three months without the Intel/Microsoft Power Management Monkeys screwing up my computer was too much to ask...

Things were *finally* starting to work mostly as they should, and I hadn't had to do the YAPORRAC dance (Yet Another Power-Off, Reboot, Restart Apps Cycle) for weeks.  Unfortunately, this week's update has my SP4 failing to wake about once a day - so far, it's always been when docked, but I haven't done much out of the office this week, so it hasn't had much chance to fail to wake when undocked.

I'm currently at 14393.576, and for the first time in a long time, I'm back to at least daily failures to wake.  I'm not actually sure if the offending release is KB3206632 (the most recent one), or the previous one, KB3201845, which was replaced by KB3206632 in only three days.

Anyway, after being pretty stable for a long time, this is definitely broken again.  Who else is having this problem again?

When my unit suffered this problem, it was guaranteed to fail to wake if it slept for more than a 1-3 minutes. I have tested these scenarios. 1, Update to Anniversary Update (which is the reported fix build) from the factory surface image which continued to which continued to fail. 2, Update to Anniversary from build 10586-104 and that also failed. 3, Wiping all partitions (including recovery) using disk tools and clean installing Anniversary (14393-0) and that has never failed.

My unit will sleep to doze after the default 2 hours perfectly and also tested it for 1hr 55mins (close to default hibernation) and it woke up fine too.

If you're running an updated version of the OS, I'd suggest backing up your important data and trying scenario 3 including wiping all existing partitions and let the Anniversary installer create new ones.