2560x1440 on 4K monitor missing
 

I have a Dell D6000 which is based on Displaylink DL-6xxx. My monitor is Acer B286HK which is a 4K monitor. I have a Macbook running High Sierra 10.13.3 with Displaylink driver 4.0.0.85514.0.

When I connect the monitor using the D6000, it displays in 4K@60Hz without issue, but the fonts are too small. Ideally I would like it to be at 2560x1440 mode but when I go to System Preferences>Display>Alt-click Scaled, the next highest resolution from 4K is 2048x1152, there's no other choices in between.

I know the monitor can do 2560x1440 since if I connect the monitor directly to Thunderbold port, by passing Displaylink I can scale to that which is the optimal resolution I need. How do I get 2560x1440 to work with Displaylink?

I have the same problem.

Not working for me either... any chance a fix will come aap?

Hello,

The thread has been created in Sep/Oct 2018 and since then there were multiple SW updates delivered which addressed many problems end users were reporting.

Could you please make sure you have the latest driver available and your macOS is up to date as well?


Regards,
Szymon

I've connected my Eizo EV3237 to a Dell D-6000 Docking Station and a Mac running macOS 10.14.3 and DisplayLink version 5.0.1
DisplayLink drivers are installed and working.
But my preferred Resolution is not offered in the Monitor System Prefs Pane: 3008 x 1692 is not offered, not even when I alt-click the scaling settings as described in one of your knowledge base articles.
SwitchResX also does not help.
And I know that the display supports this resolution: When I connect the display directly to the Mac via an USB-C -> MiniDisplayPort Adapter, I can select this resolution and it looks great.
And here are the vendor specs:
https://www.eizoglobal.com/support/c...s_x/index.html

When will you support all the resolutions that the display supports ?
And thanks for you fast answer.

I have a same problem.

Dock: WavLink WL-UG69PD1(DL6950)
Display: LG 27UD68-W
Mojave 10.14.2

I am now running into this issue after updating to driver version 5.1. Not even 1920x1080 shows in the resolution list when using the option key.

@Szymon: Any updates on this issue? 5.1 still does not offer the resolutions that my display supports.

Hi Kolt,

Any chance you could post logs captured by the support tool? We'd like to see the EDID of that monitor to understand what's going on.

Cheers,
Michal

Just sent you a pm with the logs. Thanks a lot!

@slcu8,

Can you post your logs as well? I'd expect the 2.5k resolution not available on 4k monitor not to be reproducible anymore with 5.1 release.

Thanks
Michal

same problem
 

Hey guys,
same problem here.

I'm using a 15" MBP 2018 with a Targus DOCK180EUZ and a Dell 2715Q and sometimes a Dell U2718Q.

I'm on macOS Mojave 10.14.4 (beta) and have installed DisplayLink Driver 5.1.

4K seems to work fine, but the fonts are too small to work with.

My preferred resolution (2560 x 1440 HiRes) is not offered in system preferences when connected thru the Targus Dock.
When I connect the monitor directly I can choose this solution (and many more).

Please fix this! :rolleyes:

@mlukaszek: I sent you a pm with the logs from support tool.

Hi @Snow2,
I got rid of my Dell USB-C Dock and bought an Elgato Thunderbolt 3 Dock.
Now I have all my resolutions back, without needing DisplayLink.
And the greatest thing:
The random disconnects of WIFI & Bluetooth are gone! With the Dell D-6000 and other USB-C Docks/Dongles there seem to be some general problems: https://www.bluetoothandusb3.com/the-explanation
And switching to a Thunderbolt 3 Dock solved all of them!
Cheers,
Kolt

Did you figure out on resetting the font?

Hi Kolt,

thanks for your suggestion.
Maybe I will try the elgato dock, but I think the targus display link dock was too expensive for not working properly... :rolleyes:



@ mrbickxo:
I don't know what exactly you mean...

@Snow2.
I feel your pain. I also have to sell my Dell dock on ebay. But I will never ever connect any USB 3 dock to my Mac again. No more crashes and no more lags since I switched to Thunderbolt 3!

Same here: EIZO CG-248-4K works in native resolution 3840x2160 and a couple of (non-sense) lower ones, but something usable (preferably 2560 x 1440 HiDPI) desperately missing.

Regards,
Losty

I have a 4K monitor and also had the issue that 2560x1440 (or in my case since I'm using portrait mode, 1440x2560) was not available up to the 5.2 of the DisplayLink driver. The highest option was 1080x2048 with that version.

However, the 5.2.1 Beta 3 driver available for download now makes 1440x2560 available for me, so I'm a (mostly) happy camper. (Mostly because CPU performance has taken a noticeable hit running the higher resolution - but knowing how DisplayLink works, I'd expect as much).

The bad news: the beta version dropped support for 1080x2048 and 1080x1920 (only "1080x1920 (interlaced)" remains). After a few days of having the super slow 1440x2560, I decided to go back to 1080x2048, but found that I needed to revert back to the 5.2 driver in order to do so.

The 5.2.1 Beta 3 still supports Mojave according to the release notes, so anyone on Mojave or later should try it out and see if they have similar success.

I have the same problem. When I connect the display directly I can use 2560x1440 HiDPI just fine. But as soon as I connect it via the dock, I can only use 2560x1440 lowres or 1080p with huge UI.

And I have the newest Beta 3 installed.

https://i.imgur.com/cr3x4Ra.png

Problem still there after 1.5 years
 

Hi,

I am the OP of this thread. Just to give an update, in short the problem has never been fixed for me. 1.5 years after I am still having the issue with my 4K monitor (B286HK) not having 2560x1440 HiDPI mode with Displaylink. I have since updated to Mojave 10.14.5 and Displaylink driver 5.2.1 but the problem is still there.

I have been connecting my 4K monitor using direct thunderbolt cable as a workaround (only using my Dell D6000 for the other 1080p monitor I have and the USB keyboard/mouse).

Haven't been following the thread since a year or so ago, but I was curious if this has been fixed but unfortunately no :(

Don't get me wrong, I think Displaylink is a useful feature. but I really cannot recommend it for 4K monitors on MacOS given the current lack of support for scaling 4K->1440p.

Hi,

this is the exact same issue as described here.

https://displaylink.org/forum/showthread.php?t=67397

Just tried it with newest software, still does not work.

Pleas fix this.

I just purchased a 200$ startech Dual DisplayPort for my M1 Mac mini (on Monterey last version) because I own two 4K dell that only have display port (it also has hdmi 1 but it will only support 30hz and it's really horrible to work with such a refresh rate).

And I have the same problem as the other used on this thread, it will support 2560x1440, but only in "low resolution" which again looks really bad...
These screens work just fine if I use them one by one using a on 2560x1440, so I don't understand why this is an issue... It seems to support all of the other resolutions in both low and high resolution, only this one is not listed...

I hope something can be done about this because 200$ for a huge UI or letters so small I can't read anything is a bit much ;) And I only have like 10 days to return it...

I think your waiting for HiDPI in other resolutions to be made by displaylink. Its been a request that started 9 months ago. Use better dummy as it fixes the issue for most.

I tried it and it does not work for me... it really looks like i'll have to just send it back... that's too bad, i really thought this could fix my dual display issue, and i can't believe this is not advertised...

BetterDummy works, but you have to fiddle with it a bit.

You create a dummy 4K display, set the resolution on that one to 2560x1440 HiDPI.
Then set your real display to 3840x2160.
Then you set the dummy to mirror onto you real display, then it works.

Last you attach that virtual display to you real display in BetterDummy, and it should survive reboots etc.

It's not perfect, you get few ms delay with mirroring, and also the display gets ever so slightly softer. But you do get HiDPI 2560x1440 on your monitor. It also consumes CPU, It's the only solution at the moment.

The only thing that works "better" than dummy is if you have a MacBook and use the internal display instead of a dummy and use RDM to create 2560x1440 HiDPI custom resolution for the internal display, keep the lid open then mirror that onto the real display.

For some reason the performance on using the internal display is better than dummy.

I have Samsung montiors and MacBook so I've set it up to mirror with lid open, works fine. And low-res 2560x1440 with lid closed, then use Samsung Magic Upscale Mode 2 on the monitor, not HiDPI but looks way better than just normal low res.

So when I want full performance, I just close the lid.

The email notification thing on new DisplayLink drivers doesn't work, I've set up Distill Web Monitor in Chrome on that page, so I get a notification when there's a new driver.

If you try BetterDummy, then try FullScreen-Straeming instead of Mirroring.

I have found that the rendering quality in streaming mode is better than mirroring.