Don't think it is a BIOS issue, more of a driver/conflict issue. Try using some of the tips in this post, some people have said it resolves their problem. But one thing is certain, Dell should have addressed this problem a long time ago instead of burying their head in the sand !!!!
I ran the online diagnostic from the Dell web site which found a USB driver that required upgrading. Did the upgrade and the keyboard skipping problem seems to be solved. For now.
Dell XPS 15 - 9570 - V key has to be pressed twice to type it - and it's clearly software. I hate all the experience with XPS from sleep issues, to keys now randomly deciding to not be typed .. QA should be improved before having updates made guys - it's ridiculous. It was working perfectly before an update.
I am still having this problem after updating all drivers and the latest bios for the 9570. Should I contact Dell for a system replacement? Very frustrated.
My suggestion is to stop upgrading bios from 1.2.2. Dell introduced show stopper bugs and throttling beyond this bios version. You'll have more problems than the older bios. Might as well wait until Dell reaches bios ver 3 or 10, they might be able to fix it lol
Click the link below and download the latest bios version. When updating the bios make sure the system is connected with the ac adapter as it will reboot during the bios update.
Beside the rare case of keys skipping on my 9570, I have also the trouble that frequently keys repeat.
Such as "writingggggggggggggggggggg". That happens for all keys on external and internal keyboard. This is very annoying and makes the laptop often unusable. I'm on newest drivers and tried around with different Intel and Nvidia drivers, no success so far!
I also had the issue with my XPS 15 9570 skipping keys. This is what finally worked for me:
1. Run Dell Update (Windows key, type dell and click on Dell Update).
2. Click the Check button.
3. Click Install button.
4. Follow instructions to the end (system restart may be required).