Was having this same problem and I fixed it. Check to make sure it's actually not waking! In my case the computer itself was waking but the display adapter was not. I could hear the processor fan come back on, the hard drives spin up, but nothing on my screen. In my BIOS, there was an option to not let the integrated graphics adapter sleep. It was called "RC6 Render Standby" and I turned it off -- fixed!
windows 8 won't wake up from sleep mode
I have a Dell desktop with Windows 8 and it will wake up from sleep mode if not in use for awhile but if left for longer periods it goes into sleep mode and will not wake up. I have tried to wake it
- touching mouse
- touching power button
- using windows key + C
- no results unless I do a hard power down
Now it has started to download windows updates without installing them
The best I saved for last...it will not shut down it only goes into Power Save mode
very frustrating...suggestions please?
Windows for home | Previous Windows versions | Performance and system failures
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Anonymous
2013-05-09T05:19:34+00:00 Same with Dell Latitude E5430 here. Sometimes it manage to wake up when I press the power button, sometimes it doesn't. Nothing seemed to help. I hate to turn my laptop to not sleep, so please provide a solution! Checked Event Viewer and nothing there.
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Anonymous
2013-05-09T18:24:40+00:00 I have the same problem with my Dell Inspiron 7520. After I first turned on the laptop and did initial setup, it went into sleep mode after 3 mins. I tried every key and mouse pad but I just couldn't wake it up!! I fianally had to force shut down on my brand new laptop on the first day. Very frustrating!!
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Anonymous
2013-05-27T08:59:21+00:00 I have a new computer pc with windows 8 installed but I cannot get it to wake from hibernation.
Is there some way this can be achieved?
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Anonymous
2013-06-12T12:08:44+00:00 Ibid. ASUS CM1745 Windows 8 update. Logging this from my iPhone while waiting for the automatic Updating You system to finish...10-min now and only 14%. Machine will wake from light sleep, but Hal seems to take over if its in deep sleep. Stinks but I can't do this every morning so I will disable sleep mode and burn a few more trees.