P3421W USB hub seems to crash from time to time

Hey Immanuel,

I also do experience a problem with the USB Hub from the Dell P3421W. I got the monitor connected to my Macbook Pro via USB-C and into the monitor I've connected a Logitech Streamcam and a Focusrite Scarlett USB-Audio Interface.

What drives me crazy, is that sometimes when I turn the monitor on, my peripherals get powered but sometimes not. Sometimes I have to restart the monitor 10+ times, until my usb devices will turn on.. 

Somebody got any help on that issue? Thanks!

Hi,

that sounds slightly worse than my situation. One thing that helped was buying a USB-IF certified USB-C cable. Before that it was a lot worse. But...it's still not perfect.

Kind regards

Immanuel

Hey guys,

I have the same problems. Did you get any help from Dell?

What else did you do?

Good morning.

No, even though they asked me a bunch of questions. But they never really responded to my lengthy answers. Really disappointing. How's your situation?

Hi,

I got nearly same problem (but only with 2 devices connected) - I got so many issues with Dell P3421W and USB Hub crashing.. and always in combination with Lenovo notebooks (on my end T490s, T480s, T14s).
Everything is working and then from second to the other second my keyboard stuck during writing, or mouse has same problems or even it doesn´t work anymore. Then I also have to restart, shutdown, reinsert USB C, power off display, etc. like 30 times and then sometimes it work again and sometimes not.

I got normal USB keyboard and USB mouse connected to Dell display and the USB-C (original!) Dell cable connected to my Lenovo notebook which is charging fine, display is working fine - only massive problems with mouse/keyboard.

I tried already everything - drivers up to date on notebook, firmware display up to date, display driver installed on notebook, etc. - no solution until now.
The only workaround: we connect mouse & keyboard directly to notebook… but this is not what we want.

Did you got already a solution for your problem?

Hi,

I had similar problems in the beginning. Buying a USB-IF certified USB-C cable helped. But with more than just a mouse and keyboard attached I still have problems from time to time. DELL already has swapped my monitor out for a new one from the same model but this did not help. They then advised my to turn to Lenovo support, since my laptop is a Lenovo (Yoga 14s ThinkBook).

But the Lenovo broke anyway and I am waiting for a replacement ^^

Hi everybody,

we´ve got the same problems with 10 of these displays in combination with 3 different dell laptops (Latitude 7400, 5400 and xps 17). I know that the U3419w had the same issues with the usb hub, for this model is a non public firmware available (M3B112) that´s fixing this issue.

Maybe Dell have a non public firmware for the P3421w too?!

Hello,

same here. Have my Lenovo X390 conneted and loaded with USB-C and a wireless dongle for keyboard/mouse to internal USB-Hub. Until then I had only short interrupts. But when I connected a webcam to the Hub it went worse. Mouse/keyboard stuck all the time as well as the cam. When I use the cam, it works for around 30s and then gets disconnected. When typing, keys are supressed or send several times.

Installing new display firmware M2B205 did not improve anything.

Could anyone solve thisprobbbbbbbbbbbbbbbbbbb? (thats how it looks, when I do not correct  

Hi All, 

short information - we couldn´t solve that problem! I deeply investigated but there was no solution. We now use HDMI and mouse / keyboard directly connected to the display and then the USB cable for the hub connected to the notebook and extra power cable for the notebook. 
So instead of one cable to the notebook for everything we have now 3 cables. Not good but our user can at least work without problems...
I found something in the troubleshooting guide:
Note: Dell P3421W supports display over USB Type-C port with Alternate mode DP 1.4. Ensure that the USB Type-C on your PC supports Alternate mode DP 1.2 or above.
But I couldn´t find out what exactly Alternate Mode is and what the T14s is supporting. Maybe someone else here know that?

BR,
Luise

Hey,

just researching again if this there is an solution for this persistent issue and saw your question: you can change the USB input mode in the Dell Display Manager app. This is how I use it now on my notebook now but there is still some quriks with it. The USB devices connected to the monitor will still randomly disconnect for a few seconds.

Hi, no there is no solution - buy another monitor -.- I did very much research but I couldn´t find a solution for this. We use also other displays now in work to avoid these issues as Dell doesn´t found a solution for this.

I have the same issue which monitor should i buy instead? 

I write you a PN.

Has anyone found a solution to this? Experiencing the exact same issue

I have the same issue and I was hoping the best with the new firmware M2B207. Unfortunately, I cannot install the firmware. I get a checksum error every time. Is this only happening to me? Has anyone been able to install the firmware and does it fix the problem?