Macbook Pro heating up while asleep in sleeve

alphadog808

macrumors member
Original poster
Dec 16, 2015
40
10
I opened up my sleeve to use my macbook pro this morning and it was extremely hot and the fans were blowing at full speed. This happened once before but now I am starting to get concerned as it happened again. When I opened the laptop the screen was blank and it was unresponsive.

I had to force shut down the computer and restart it to get it working again.

I reset SMC already and I took off power nap.
It is a 2015 15" Macbook pro.
 

rugmankc

Contributor
Sep 24, 2014
2,178
640
Not sure on your question. But, I always turn mine off in a sleeve. AFAIK things can still be running in the backround and no place for heat to vent.
 

maflynn

Moderator
Staff member
May 3, 2009
66,887
33,837
Boston
Most likely the computer was not asleep when you put it in the sleeve. To be safe, in the future shut it down.

To bad, Apple removed the sleep indicator late, that glowing white light was a nice way to have some peace of mind that the computer is in deed asleep.
 

Mernak

macrumors 6502
Apr 9, 2006
435
16
Kirkland, WA
Do you have any USB devices inserted. Sometimes they prevent the laptop from sleeping properly, which can cause overheating and battery loss in the sleeve. Alternately, are you using anything that messes with the sleep settings (I think Caffeinate is the common one)?

Sleep should prevent anything from running in the background, but if it wakes for some reason, then you can get the background processes.

I've been using my laptop sleeve for carrying mine around since 2008, and I don't think I've encountered this before.
 

alphadog808

macrumors member
Original poster
Dec 16, 2015
40
10
Im mostly wondering how i can prevent this from happening or if its a hardware fault
 

Blue Sun

macrumors 6502a
Feb 11, 2009
912
197
Australia
Very strange, OP. I routinely carry around my rMBP asleep in a sleeve and I've never encountered this. Likely the machine didn't sleep when you closed the lid, it was probably caused by a rogue application or process.
 

Aneef

macrumors regular
Jun 4, 2015
237
70
Lahore, Pakistan
I opened up my sleeve to use my macbook pro this morning and it was extremely hot and the fans were blowing at full speed. This happened once before but now I am starting to get concerned as it happened again. When I opened the laptop the screen was blank and it was unresponsive.

I had to force shut down the computer and restart it to get it working again.

I reset SMC already and I took off power nap.
It is a 2015 15" Macbook pro.
This happened to me too. I put my bag containing my rMBP in my car's boot in the evening, but when I took out my bag from the car at night then the Macbook Pro was burning hot and fans were so loud as soon as I opened the lid of my laptop. I opened it and there were 3,4 Coconut Battery's notifications and all of them were during the time when the rMBP was in the trunk of my car (Coconut battery reports time with the notification)
 
Even when your computer is asleep, it generates a low power energy, enough to keep things going in RAM and sometimes even network connectivity to update things in the background (power nap). Voltage = heat, and the heat is usually pulled out of the device, but neoprene sleeves, have this great knack for retaining heat. What you are doing is putting a hot pizza that is still giving off heat in a delivery bag, it stays warm until you take it out. The only difference is this pizza has it's own built in oven, so it will just get hotter and hotter. Turn it off before you put it in the sleeve. It can't be that bad to wait on flash storage to boot up. The days of Windows 98 and dialup internet are over, that was real waiting, and the reason for morning coffee.
 

Fishrrman

macrumors Core
Feb 20, 2009
19,786
6,913
The new MacBook Pros with internal SSDs boot up so quickly, that it's probably easier (and safer) to shut them all the way down when traveling (or packing it away) for any length of time...
 
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