Dell XPS 15 7590 missing keystrokes

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Follow up--the above description isn't the whole story. While re-installing / updating the BIOS does indeed fix the problem, it's a temporary fix. An easier (but still temporary) way is, on reboot, hitting F2 and entering BIOS setup, then choosing to restore BIOS factory defaults. The laptop will then boot with the NVIDIA driver and keyboard functionality will be normal again. 

The problem recurs for me when the laptop crashes, and the crash message indicates some problem with the sleep mode of the computer. I've stopped putting the laptop to sleep, and instead powering off when I don't need it. Possibly because of this, the frequency of this problem has gone way down to the point where I no longer feel a need to pursue more time-consuming fixes. 

I am experiencing the same problem with my XPS 15 7590, except...

1. My missed keystrokes are more frequent (1 out of 4 to 6 are missed)
2. I am already up-to-date with BIOS updates, and the NVIDIA display adapter is already present and visible in Device Manager

Just like the original poster, I don't experience the problem when using an external keyboard.   However, using an external keyboard is not really an option when I'm on the road, and I'm at my wit's end dealing with this problem. 

I will try to avoid using the 'Sleep' function to see if that helps.   (You would not believe how long it took to write this short and simple post on the integrated keyboard)

My XPS15 7590 has exactly the same issue. So, yesterday I did a Dell update which included the latest BIOS (22 I think) and I do see 2 display devices (including the NVIDIA) in my Device Manager.  I'm running Visual Studio 2022 and the problem is waaayy worse in there than typing in this Chrome web browser.

So, here's my problem, missing keystrokes, yes, usually I have to hit it a few times for certain numbers, such as 4, 5, 6, 7, 8, which just happen to be the numbers I've noticed it the most on.  Full diagnostics/etc, everything "passes", however, I still have the intermittent problem.  At this point I'd just like to get a replacement keyboard and replace it myself and be done with it.

I have a similar keyboard problem with my XPS 15 7590 (all updates and firmware are installed).
I initially noticed it a year ago and contacted Dell. But none of the steps they suggested helped. I didn't follow up since I have been using an external keyboard ( I have used the laptop keyboard less than 50 hours in the past 2 years).
It's gotten worse to the point that the laptop is barely usable without an external keyboard! For example, I just pressed all alphabet keys from left to right, top to bottom, and got this "qertuioasghkxvnm" (16 out of 26!)

I just tried typing in the BIOS setting to rule out any hypothesis of Windows/Driver malfunction!
I have the same problem in the BIOS page! 
I pressed firmly all alphabet keys from left to right, top to bottom, and got the followings:

First try: ertyuioasdghkxcnm   (missed qwpfjlzvb) 

Second try: qwertyuioasfghjklzxvbnm  (missed pdc)

Dell support, please feel free to jump in!

I would say "barely usable" is very charitable of you.  I posted above about this in Sept 2022.  I haven't found a solution.   I now carry around a portable fold-up keyboard to use when I am on the road.   It looks ridiculous since that external keyboard is barely larger than the actual laptop keyboard, but the laptop is otherwise worthless without an external keyboard.   Or you can bring up the onscreen keyboard and try to get along with that.

xps 17 2023 has the same issue. Missing keystroke while plugged in, with either original 130W adapter or 3rg party pd charger.