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XPS 13 9300 thunderbolt 3 issue

Hi, I have bought the new XPS 13 9300 and I wanted to connect it to my ultrawide monitor. I have tried 3 different ways: usb-c, thunderbolt (my monitor has a tb3 input) and through a TB dock. In all 3 ways the laptop would start and stop charging frequently and also disconnect from the external monitor. What I noticed is that this problem would go away as soon as I plug in the charger. Which shouldn't be the case as my monitor as well as the dock provide 85w. What could be the problem? I am going crazy as this was the reason to buy the XPS 

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Re: XPS 13 9300 thunderbolt 3 issue

And how is that a problem when the large monitor is restricted to the desk-use-only anyway?

Sounds like the little XPS-13 just wants some power. 😀

What is make/model of Dock?

And please, one post per issue please. Let's use your thread here.


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Re: XPS 13 9300 thunderbolt 3 issue

The dock is the Caldigit TS3 plus. However, the laptop should be able to charge and display on an external TB3 monitor with only one cable, or?

 

 

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Re: XPS 13 9300 thunderbolt 3 issue

OK, well the Caldigit TS3 Plus is pretty nice, and you should see some good compatibility. However, it sounds like it is working to your satisfaction, except for the power-handling.

Are both the Caldigit-TS3-Plus and XPS-13 (9300) both running the latest firmware ? 


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Re: XPS 13 9300 thunderbolt 3 issue

Yes, but I don't want to have 2 cables on my laptop since one should be enough.

Firmwares are up to date.

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Re: XPS 13 9300 thunderbolt 3 issue

How about the firmware on the LG34wk95u ? (since it sounds like it is also connected in every system-connection scenario) 


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Re: XPS 13 9300 thunderbolt 3 issue

I have done this as well. Generally I am an Update-Freak.

I think the problem is the XPS. and it's a shame because this thing costs 2000€

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Re: XPS 13 9300 thunderbolt 3 issue

I don't want to have 2 cables on my laptop since one should be enough.

-----------

Well, I have both the MacBookPro-15 (2018) and the new XPS-13 (9300) here. However, I have no high-end docks here at the moment (only a little hub, with no power-delivery).

Typically, you can't connect power-rails together. I'm not sure on USB-C/TB-3, but I would imagine that the connected devices negotiate, and the one they decide is most powerful ... supplies the power. What do you think?

Edit: I later found this. Looks like I might have guessed correctly, after all:

https://forums.macrumors.com/threads/connecting-tb3-to-multiple-power-sources.2128888/


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Re: XPS 13 9300 thunderbolt 3 issue

I don't understand what you mean exactly. One purpuse of a dock is to supply power. However there seems to be a problem with the port of the laptop as it does "accept" the power from the dock.

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Re: XPS 13 9300 thunderbolt 3 issue

So, if you power-up the Caldigit-TS3-Plus Dock, and then connect only the XPS-13 (9300) to it 
(no LG monitor or anything else connected) ...

... you are saying the dock will not power and/or charge the XPS-13 ?


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- Consider giving posts you like a "thumbs-up"
- Posting models-numbers and software versions speeds trouble-shooting.
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