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acvyse
1 Nickel

Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Hi all,

I guess I am kind of desperate at 1:45 am haha...

I just got my XPS 13 9350 and it is awesome. I ordered the DA200 USB-C to USB3/RJ45/VGA/HDMI adpater. Unfortunately I am experiencing a few problems with the device. They are listed below:

1) plugging in, computer does not recognize the device. If I right-click and uninstall in Device Manager and do a "scan for new hardware", it works again - but not for long.

2) The device and the Realtek gigabit portion connect and reconnect every second in device manager and that is annoying.

3) Disabling the wireless card/connection seems to actually help the device connect and it works at 100%. ONLY when the wireless card is disconnected.

Basically, windows is having a real hard time keeping this adapter connected...almost like it can't recognize it. I tried installing the device drivers for the adapter - nothing. I updated all the thunderbolt firmware from Dell (including chipset) and the BIOS...nothing. Same thing. If you do a google search, there are a few threads on this exact problem. There is a nice sized one on Reddit.

Does anyone have any idea what is going on? It is a real shame a beautifully designed and pricey adapter is not working with a Dell computer.

Thanks, AJ

24 Replies
mazieaz
1 Copper

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Ditto.  I set up a customer with the XPS 13 9350, USB-c DA200 and even got her to buy a Dell display.  All firmware is updated and the HDMI refuses to maintain connectivity.  This single point of poor design (or manufacture) has turned a very nice, expensive computer setup into a complete hassle.  Shame on Dell.

sparksdls
2 Bronze

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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In another thread ("XPS 13 9350 - SSD on USB C 3.1 - very unstable/unusable" - I can't add links), the following fixed my XPS 13 9550 problem using a USB 3.0 HDD with the Dell USB-C to HDMI/VGA/Ethernet/USB3.1 adapter:

... the USB-C and WiFi adapter are somewhat related hardware and voltage wise. If you go into the advance options of the WiFi adapter and change the WiFi output to 75%, it fixes a lot of the problems with the connecting and disconnecting USB-C issues. Lowering the output to 75% does not affect your connectivity on wireless networks. 

My HDD kept connecting/disconnecting when using the adapter but this fix took care of it. 

acvyse
1 Nickel

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Yep...that was the answer. How do I know? Because I gave the suggested answer on that thread. LOL . Thanks SPARKSDLS!

-AJ

sparksdls
2 Bronze

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Doh!  Well, thanks for the fix on it!  Have you seen other issues with the WiFi card on the XPS 13?  I found that if Bluetooth is used - I used a Bluetooth mouse - that WiFi is terrible.  It would disconnect and speeds were terrible.  Turn off Bluetooth and no problems.

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acvyse
1 Nickel

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Hey Spark,

I don't have any speed difference with bluetooth on vs. off. I usually don't use bluetooth as I find it completely unreliable. However, Bluetooth low power 4 is rather good...so it is changing my mind slowly. Haha.

AJ

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sparksdls
2 Bronze

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Seems to be a hit and miss thing, then.  I was seeing a lot of WiFi disconnects/reconnects and then came across a post somewhere where someone was having the same issues and the Dell rep recommended turning off Bluetooth;  I did and all of my disconnect issues went away.  I just tested it again and with Bluetooth off, my download speed was 76Mbps and with Bluetooth on, it was 4Mbps.

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jlslater
1 Nickel

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Can you give more info on the exact settings to change? I'm having the same problems but don't see anything that looks like WiFi output in my advanced options for the adapter. Thanks!

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sparksdls
2 Bronze

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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In Device Manager, in the Advanced settings for the device under Network Adapter, you want to change "Power Output" to 75%.

jlslater
1 Nickel

RE: Problems with Dell USB-C (DA200) to HDMI/VGA/RJ45/USB3 adapter

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Thanks. I made the change and rebooted but unfortunately that didn't seem to help. I updated the BIOS yesterday while on my 2 hour support call - the adapter is now working for the ethernet and USB ports, but still not able to detect the external monitor via HDMI. Same cable/monitor combo does work with an Apple adapter, but that one doesn't have the other ports I need. Any further suggestions very welcome! (Dell support of course just says I need a new adapter.)

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