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29 Posts

11-02-2019

DK

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 7:05 AM

If it isn't a software or a keyboard problem. Then it might be the little keyboard driver board that is glued to the keyboard. That didn't get changed when they changed my keyboard. 

I've noticed that my TrackPoint click buttons sometimes also misses a stroke. That was actually the reason I tried to update TrackPoint firmware, which bricked my TrackPoint.

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29 Posts

10-11-2017

SG

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 10:05 AM

According to

https://stackoverflow.com/questions/6747046/how-does-the-keyboard-input-get-into-the-terminal

 

 

As you type, the processor in the keyboard analyzes the key matrix and determines what characters to send to the computer. It maintains these characters in its memory buffer and then sends the data.

 

Many keyboards connect to the computer through a cable with a PS/2 or USB (Universal Serial Bus) connector. Laptops use internal connectors.

 

 

So the whole scanning logic is implemented in this circuit board mentioned by @TomDenmark, this board will scan key presses, then send the key stroke to cpu.

 

According to the delete test mentioned by @Darrsol, when you press the delete key and it misses, even if you hold the delete key, it will not start deleting any word.

 

Because in the OS, you can easily set the Repeat Delay and Repeat Rate, so I believe that what the keyboard circuit driver sends to the CPU is the information that which key/keys are pressed and which key/keys are released, it will not repeatedly send the keys to CPU if you hold on the key for a while. The repeating work should be done by the Operating System rather than the circuit board driver.

 

So, I think it should be something wrong with the this circuit board under the keyboard. Either it misses some key strokes, or it fails to send the key press/release information to the CPU.

 

And the worst problem is something wrong with the mother board and it fails to receive the key strokes sent from the circuit board under keyboard.

 

 

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29 Posts

10-11-2017

SG

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 10:33 AM

I hope I am not wrong.

 

I changed the Keyboard Repeat Delay settings in control panel to slowest, then it seemed that the key stroke missing is getting away... 

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5 Posts

12-04-2019

DE

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 11:22 AM

Can't confirm.

I have used the shortest Repeat Delay and the fastest Repeat Rate in the past (W10) but I still get skipped keys with the longest Repeat Delay setting.

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8 Posts

12-05-2019

RU

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 14:13 PM

I've faced the same problem on my X1E Gen2 4k IPS and  i7 9850h. Produced in July, purchased in late October. Really frustrating issue :/

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9 Posts

12-05-2019

US

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 19:56 PM

Same problem here.   This thing has so many problems out of the box that I probably will never purchase another Lenovo machine for our business again.   Random Stuttering, missing keystrokes, and inability to use my USB C devices  all out of the box.   It's like they just cobbled this thing together and never tested to make sure that it works.

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6 Posts

11-26-2019

PL

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 20:33 PM
I'm starting to think like you ... and I've been buying Lenovo for 10 years, now I'm scared.
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196 Posts

12-01-2019

CL

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-05, 21:59 PM

We must have patience... At least the problem is acknowledged by Lenovo.

 

I came here running from an Asus ZenBook Pro. Everything is better than that, even missing some keys.

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25 Posts

11-20-2019

US

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-06, 1:36 AM
This did not work for me.
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14 Posts

11-21-2019

US

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Re: X1 Extreme Gen 2 missing keystrokes

2019-12-07, 3:08 AM

Is there an ETA on a fix?

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