wow finally i have found someone who no longer makes me think im crazy and can confirm when i have to tell every customer service person it is not a hardware issue. long story short did a windows 11 update on 4/13/22 then had to do a restart like with any update and that was the last time i have spoken to my keyboard lol. when i originally tried resolving it and basically till i found ur post every person made me feel like its a hardware issue and they have never heard of anything of this nature happening. i have been waiting till i had more free time to fully deal with this as i am currently using my latop with a wireless keybaord ontop of my internal keyboard lol. i need my laptop for my job and it is very important to me so im waiting till things slow down with my job where i can do whatever has to be done with this. anyway please tell me what i need to do and is there a cure out there lol bc ive tried everything in the book even a factory reset to windows ten and it still wont work . this has been an absolute nightmare for me to deal with and its insane how dell and even microsoft made it seem like my laptops issue is something the world has never seen or dealt with before. its also crazy how i only have found u where this has happened to. like are we the worlds unluckiest human beings or something. my name is cj btw.

It's definitely a driver issue, I have gotten my keyboard working on windows 11 only for it to periodically stop working. I have had some luck uninstalling all the devices under Keyboard category on device manager and under Universal Serial Bus Controllers, but the problem will randomly return, and sometimes uninstalling all the devices doesn't fix it. I have gotten it working again through repeatedly doing this but it's extremely frustrating and time consuming.

I shutdown and powered up my laptop Dell M15 R4, keyboard stopped working again.

Steps I used to make keyboard work again...

On Windows 11 I pressed accessibility in bottom right to access the On Screen Keyboard, logged in, accessed Device Manager.

Expanded Universal Serial Bus Controllers

Uninstalled device called Unknown USB Device (Device Descriptor Request Failed)

Right click - Scan for hardware changes.

Keyboard works again, not sure why but it keeps doing this for me, likely some sort of driver issue. I have tried reinstalling Alienware Command Center, chipset drivers, etc. This is as narrowed down as I could get it.

In addition to the steps above, it didn't work again after restarting and doing those steps. Pressing power button to enter sleep mode and exit sleep mode then repeating the above steps would fix it.

Did you try putting it in sleep mode and then waking it up again and trying the steps, after restart my keyboard stopped working as well. That seems to consistently work for me. Obviously this isn't really an acceptable experience though I suspect it's something with Windows 11 and the drivers.

I will try that before I try the windows 10 install. Is that something you have to do every time you start it up? If so that's not a good long term solution for me.

The daughterboard has been replaced. While the tech was present, I uninstalled the unknown USB device driver under device management, then scanned for hardware changes. When it did not reinstall an unknown USB drive the keyboard worked. I then restarted the computer. The keyboard did not work on restart.

When I next uninstalled the unknown USB driver, hardware changes scan reinstalled the same driver. Keyboard did not function again at any step of this process.

Next, I will be installing Windows 10 to see if the keyboard works in Windows 10. If the keyboard works in Windows 10, and does not fail, I will consider it fixed enough unless the problem resurfaces. If the keyboard does not work even in Windows 10,or the problem comes back even in Windows 10, I am all out of ideas for how to fix it and will contact Dell support directly for next steps on exchanging the faulty product.

So far it seems to be working when I do the trick I hope they fix the driver issues though, clearly it's not hardware, keyboard always works fine in BIOS. Windows 10 should be fine as I think this only happened after a March-April Windows 11 update. Haven't tested Windows 10 to be sure.

I tried it, and that did not work for me, thank you!

Update 2: Windows 10 downgrade did NOT fix this keyboard problem as I had hoped. I have officially exhausted every fix put forward and will be calling Dell technical support about next steps for this faulty product.

I got the exact same issue! But uninstall Unknown device didn't help. The led lights work fine, and it can even disable mousepad if I press fn + F11 but other keys just don't work

I suggest officially opening a ticket with tech support ASAP and doing everything they recommend, especially if it's still under a support warranty. They have been unable to help me find a fix for mine, both hardware and software, and are now replacing my laptop. Their tech support and customer service are top notch if you reach out to them.

Thanks for the advice. I will try to make that my last resort. I feel it's definitely a driver issue. The keyboard actually works in Diagnostic mode.

i contacted support, and the solutions given haven't gotten me anywhere yet. have you fixed yours?