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4 Posts

12-03-2019

United States of America

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  • Message 21 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-02-23, 7:03 AM

@stsh That warranty bit is just being optimistic. I'm sure it works in some countries; where I'm from, this has user error plastered all over it.

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6 Posts

02-22-2021

United States of America

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  • Message 22 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-02-23, 16:32 PM

@ woodsielord wrote:

@stsh That warranty bit is just being optimistic. I' sure it works in some countries; where I' from, this has user error plastered all over it.

I think we're in the same country and It is a bit optimistic, but what choice do we have unless lenovo decides to add the s3 sleep mode back to their firmware? You simply have no way to control modern sleep. All of these registry "fixes" and powercfg commands don't do a thing to it. All you can do with it is disable it and have no standby mode at all. 

 

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32 Posts

02-02-2014

Canada

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  • Message 23 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-02-24, 2:33 AM

@ stsh wrote:

@ woodsielord wrote:

@stsh That warranty bit is just being optimistic. I' sure it works in some countries; where I' from, this has user error plastered all over it.

I think we' in the same country and It is a bit optimistic, but what choice do we have unless lenovo decides to add the s3 sleep mode back to their firmware? You simply have no way to control modern sleep. All of these registry "fixes" and powercfg commands don' do a thing to it. All you can do with it is disable it and have no standby mode at all. 

 

 

Using the registry edit I posted restores S3 when it disables S0 on my 15" C940 9750h, no problem. Wakes up from sleep a little slower but that's about it.

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6 Posts

02-22-2021

United States of America

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  • Message 24 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-02-24, 2:58 AM
nice. must be the difference in hardware. on mine powecfg shows just hibernation and everything else not supported by firmware regardless of the s0 state.
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1 Posts

03-04-2021

United States of America

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  • Message 25 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-03-04, 22:41 PM

I've had this problem with two different 940's, what I've found is that if I turn off intelligent cooling, it seems to solve the problem. I've had my current unit for months and recently did the firmware update. After the update it happened again and on reboot I checked and found that intelligent cooling was on again. Recently it did it another time and on checking intelligent cooling was once again on (don't know how that happened). So I've had this laptop for several months without it happening and in the last week it happened twice and both times intelligent cooling had been switched on.

 
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1 Posts

04-17-2021

United States of America

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  • Message 26 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-04-17, 13:55 PM

Well...same experience.   Sleep mode is not sleeping- It’s overheat mode.   And it’s significant, crucial overheat.  My laser thermometer showed it at 160 degrees and at the battery 181 degrees after appearing “off” sitting on a desk, plugged in.   There is no safe product that should ever achieve temperatures at this level.

(Medium rare steak is 135 degrees).        After a bout in the freezer- it turned back on.  Last night same- I closed the screen onto the keyboard. Plugged in to charge overnight and went to bed.  I awoke to the smell of hot electronics/plastic only to find yet again- the Yoga “closed” and no fans running- was exceptionally hot.

LENOVO- THIS IS A SAFETY RECALL ISSUE.   FIRE ?  BURNS?  Equipment damage?  Shorten battery life?  Shorten equipment life?  I spent a month researching and now very disappointed in no solution other than “I” have to disable sleep mode?  

 

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32 Posts

02-02-2014

Canada

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  • Message 27 of 27

Re:Yoga C940 Overheating in Sleep Mode

2021-04-17, 21:21 PM

@ CKLenovo wrote:

Well...same experience.   Sleep mode is not sleeping- It’s overheat mode.   And it’s significant, crucial overheat.  My laser thermometer showed it at 160 degrees and at the battery 181 degrees after appearing “off” sitting on a desk, plugged in.   There is no safe product that should ever achieve temperatures at this level.

(Medium rare steak is 135 degrees).        After a bout in the freezer- it turned back on.  Last night same- I closed the screen onto the keyboard. Plugged in to charge overnight and went to bed.  I awoke to the smell of hot electronics/plastic only to find yet again- the Yoga “closed” and no fans running- was exceptionally hot.

LENOVO- THIS IS A SAFETY RECALL ISSUE.   FIRE ?  BURNS?  Equipment damage?  Shorten battery life?  Shorten equipment life?  I spent a month researching and now very disappointed in no solution other than “I” have to disable sleep mode?  

 

 

Read my post about disabling S0 and getting S3 sleep mode back.

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