kriive
1 Copper

DA300 adapter + Ubuntu Linux 18.04.2 + 4k display

Good morning everyone.

I recently bought my XPS 13 9370 (2018) w/ Ubuntu 18.04.2 LTS (Dell respin) and a DA300 USB-C adapter.

I had 200$ spare and I got myself a 4k display from samsung (U28E570D), which shipped with a free displayport cable yay.

Long story short, displayport cable only outputs 1440p/60Hz, random HDMI cable outputs native 4k resolution @ 30Hz. Why is that? Linux drivers? Kernel? Cable? Why can't I use 4k/60Hz with displayport?

 

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3 Replies
7 Plutonium

Re: DA300 adapter + Ubuntu Linux 18.04.2 + 4k display

4K 60Hz requires an ACTUAL GPU not a usb dongle.

4K 60Hz also requires DUAL Display port 1.2 cables.

USB3 is NOT Thunderbolt 3 even though they use the same connector.

 

 


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kriive
1 Copper

Re: DA300 adapter + Ubuntu Linux 18.04.2 + 4k display

4K 60 Hz is supported by XPS graphic card, isn't it? And my XPS has Thunderbolt 3.
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7 Plutonium

Re: DA300 adapter + Ubuntu Linux 18.04.2 + 4k display

An EGPU with dual display port attached to thunderbolt 3 might work but the standard thunderbolt interface only has 1 and only 1 display port output not 2. 

You are demanding more bandwidth than HDMI or single Display port supports.

Never going to happen.

 


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The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support






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