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taffysaint
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February 20th, 2022 22:00
U3421WE, USB Type-B upstream issues
Hi All,
I specifically ordered this monitor because of the built-in KVM switch, so I I had it all connected up. Put the Mouse, Keyboard, Mic, Camera all into the monitor
USB-C Upstream connected to Mac
USB-B connected to Dell XPS 8930
Everything works 100% fine *until* I want to use video conferencing (Zoom, Teams, Discord) on the PC, at which point I lose all sound and the keyboard and mouse just stop working every 3-5 seconds.
If I connect the USB-C to the desktop, everything works fine.
I spent 4 hours or so with Dell Support today with the result basically being 'I know your monitor is a week old and it doesn't work properly, but you're going to need to pay for software support if you want to get it fixed'
Anyone else seen this problem before I send it back and look for another monitor?
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DELL-Chris M
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Posted February 21st, 2022 13:00
USB Type-C Upstream connected to Mac
* Makes sense since USB Type-C provides USB Power Delivery, Data, and DisplayPort video signal.USB Type-B connected to Dell XPS 8930
* Which provides access to the USB downstream ports. But how are you getting video from the XPS 8930 into the U3421WE?* In the "Setting the KVM switch", the usage shown on page 62 =
When connecting HDMI + USB-B to computer 1 and DP + USB-C to computer 2* In the "Setting the KVM switch", the usage shown on page 63 =
When connecting HDMI + USB-B to computer 1 and USB-C to computer 2* I do not see this usage =
When connecting DP + USB-B to computer 1 and USB-C to computer 2
DELL-Chris M (old account)
#IWork4Dell

taffysaint
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Posted February 23rd, 2022 00:00
Apologies, I did not include the video connection as it wasn't relevant to the problem with the USB devices. I am using USB-B and DP from the XPS to the monitor. After spending some time trying a different cable (luckily I had one) and multiple USB ports, I found a combination that worked utilising one of the 5gbps USB 3.1 ports, instead of the 10gbps port and a different cable. I managed to get this working correctly last night
The disappointment here is that I spent a half day basically being told that this was my fault and when the 'Update your drivers, firmware and OS' advice failed to give any results, I was told to go pay for premium software support (which wouldn't have helped). Even after giving up on any hope of useful assistance and suggesting a return, it took 2 days to get a message saying 'we'll get back to you in 2 days'
Anyway, its working now but its a very poor support experience