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2 Posts

11-20-2018

CA

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T480s is forced into sleep mode when in close proximity to T480/T480s

2018-11-20, 20:02 PM

This is more of an intrigue than an issue but I'm still curious as to why this happens.

 

Issue: When placing a T480s on top of another T480s both machines will be forced into sleep mode.

 

 

How to reproduce: Line up a T480s on top of another T480s (or T480) and the device will go into sleep mode. 

I've Stacked T480 units and this does not happen this seems to only affect the T480s line. (These test were preformed on the latest bios/driver revisions)

 

What I think maybe happening is that the T480s when stacked are triggering the lid closed sensor of the other unit. Since this is not the case for the T480 units we have I think it may be because of the thickness of the s models.

 

Is this something that will eventually be fixed via bios update? or is this just a flaw in the T480s design?

 

Thanks for in advanced for your response!

 

 

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45 Posts

09-10-2018

US

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Re: T480s is forced into sleep mode when in close proximity to T480/T480s

2018-11-20, 20:18 PM
I've seen this happen in the past, it was due to how strong the magnets are that keep the lid shut.
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146 Posts

07-13-2018

US

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Re: T480s is forced into sleep mode when in close proximity to T480/T480s

2018-11-20, 20:41 PM
 wrote:
I've seen this happen in the past, it was due to how strong the magnets are that keep the lid shut.

 

 

I often forget, the magnet is used to do more than just trigger the Hall-effect sensor.

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2 Posts

11-20-2018

CA

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Re: T480s is forced into sleep mode when in close proximity to T480/T480s

2018-11-20, 21:04 PM
Just did a little reading on the Hall effect and hall effect sensors, It was some pretty fascinating stuff.

I can understand why Lenovo wouldn't want to use a weaker sensor on the thinner models to prevent scenarios where the device doesn't actually go to sleep on close.

Alas, I guess for now I will have to settle for alternating the way I stack them.

Cheers
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