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22 Posts

06-02-2020

Trinidad and Tobago

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What exactly triggers the 4 Yoga Modes?

2021-03-15, 13:47 PM

This is my last attempt to fix one of my X1 Yoga G2 that refuses to convert to tablet in the OS.

 

When you fold a Yoga into tablet mode, I need to know what tells the OS to do things like the following:

 

1) Disable keyboard and touchpad (to avoid accidental pressing in tablet mode)

2) Enable onscreen keyboard upon touching a typeable area (this does not happen in laptop mode)

 

I know this should be a combination of a mechanical sensor and a software driver.


I am 99% sure that it is not a hardware problem after swapping the motherboard into a fully functional chassis.

 

Please help me understand what exactly is supposed to happen when you fold this laptop.

 


This is after two weeks of troubleshooting, swapping motherboards, disassembly to learn the engineering etc.

 

The warranty expired a few months ago and the "contact us" page is blank today for some reason. 

 

At my wits end here.

 

I REALLY APPRECIATE THIS.

 

~ Digital Audio Workstation Life ~
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2250 Posts

03-11-2020

Greece

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Re:What exactly triggers the 4 Yoga Modes?

2021-03-15, 14:21 PM

Hi DAWlife ,

 

Welcome to the Community Forums.

 

After all the extensive troubleshooting you've done, I'm going to assume you've already checked that you have these settings ?

 

Control panel-> Keyboard (use icons) -> Keyboard Lock -> Auto Lock the keyboard and touchpad (recommended).

 

Some users do report this to have fixed the issue but some has also said that this Win 10 "Option" was not available on their device.

 

In the event you do not have these settings, please make sure you have the latest Keyboard (Trackpoint firmware), Chipset (Sensor Hub Firmware and Chipset) drivers , while also getting the latest Lenovo System Foundation Interface drivers as of 12 of March.  They can all be manually downloaded from the Support Site. Just plot in the serial number and navigate to Drivers & Software - Manual Update.

 

Regards

 

Voithos



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22 Posts

06-02-2020

Trinidad and Tobago

25 Signins

170 Page Views

  • Posts: 22
  • Registered: ‎06-02-2020
  • Location: Trinidad and Tobago
  • Views: 170
  • Message 3 of 5

Re:What exactly triggers the 4 Yoga Modes?

2021-03-15, 14:29 PM

@Voithos thanks for this quick response.


All of the X1 Yoga Gen 2 I recently acquired were given clean installations of Windows 10 and then System Update drivers and Firmware.

So I believe they all have the same default settings, but I can double check that when I get home soon.

~ Digital Audio Workstation Life ~
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22 Posts

06-02-2020

Trinidad and Tobago

25 Signins

170 Page Views

  • Posts: 22
  • Registered: ‎06-02-2020
  • Location: Trinidad and Tobago
  • Views: 170
  • Message 4 of 5

Re:What exactly triggers the 4 Yoga Modes?

2021-03-15, 22:02 PM

@Voithos  Ok there is no such option available. In any case as I mentioned all the settings with my laptops are identical as they have clean installations and updates done at the same time. 

 

Is there any way I can use the (edit:) Process monitor to observe in my working units what is supposed to happen?


I think the only thing that will show in Procmon for my defective unit is the Unmanageable Key Combinations triggered. 

 

Also, I still have no idea what exactly triggers the Yoga modes in Windows. What driver is responsible for it? Is it a magnetic sensor? I could not find any information at all. 

~ Digital Audio Workstation Life ~
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2250 Posts

03-11-2020

Greece

245 Signins

11491 Page Views

  • Posts: 2250
  • Registered: ‎03-11-2020
  • Location: Greece
  • Views: 11491
  • Message 5 of 5

Re:What exactly triggers the 4 Yoga Modes?

2021-03-16, 9:07 AM

@ DAWlife wrote:

Voithos  Ok there is no such option available. In any case as I mentioned all the settings with my laptops are identical as they have clean installations and updates done at the same time. 

 

Is there any way I can use the (edit:) Process monitor to observe in my working units what is supposed to happen?


I think the only thing that will show in Procmon for my defective unit is the Unmanageable Key Combinations triggered. 

 

Also, I still have no idea what exactly triggers the Yoga modes in Windows. What driver is responsible for it? Is it a magnetic sensor? I could not find any information at all. 

 

 

 

I am unfortunately not able to pinpoint what exactly triggers the tablet mode, but if I had to make a logical guess, then I'd say it's a magnetic sensor of sorts at certain fold points of the device. I've troubleshooted devices where the sensor drivers have made a difference, so it's the only one I've come across that makes sense, but unfortunately I have not come across any article on how foldable/tablet laptops actually mechanically work.

 

Regards

 

Voithos



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If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!
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