DisplayLink 1.4

tommiy · 06-03-2021, 10:29 AM

Looking at my neighbours set up of:

M1->D6000->LG 4k

And the interesting part is with just a single monitor connected via HDMI from the dock if you do not load the DisplayLink Manager the Mac has the options of various HiDPI resolutions but at 30Hz. So in this mode he can select 2560x1440@30 Hz HiDPI. If you start the 1.4 Displaylink Driver then all the HiDPI options are removed and replaced with lowres @60hz versions. So to me it appears that its the driver. No idea why with a single monitor the driver removes the HiDPI settings that are available without the driver.

DmitryAE · 06-03-2021, 11:54 AM

Quote:

Originally Posted by tommiy

No idea why with a single monitor the driver removes the HiDPI settings that are available without the driver.

The answer to your question is pretty simple. If you exit DisplayLink Manager, the Macbook will use display with native support. I'm not sure about 30Hz, but press "Scale" with the "option" button pressed. I think this will allow you to select 60Hz. If you open driver then it simulates the display and has no HiDPI >1080p due driver's bug.

Also please check if the HDMI cable supports 4k 60Hz. For example, HDMI 1.3-1.4b easily supports 1440p @ 60Hz, but only 4k @ 30Hz.

DmitryAE · 06-06-2021, 07:48 AM

Just want to add my review.

I've worked a lot the last couple of days and noticed that there is no difference in performance between native 4k (1440p HiDPI) and 2560x1440 (low resolution).

I'm waiting 1440p HiDPI with same performance. Thanks.

fabianotessarolo · 06-06-2021, 12:39 PM

Hi Folks,

Here my setup is m1->D6000-> Dell 4k+ LG 4k.

Before BigSur 11.4 my setup was showing 4k support, after update to 11.4 it shown only 1080p.

I've updated the driver and now I see this low res message, I'm little lost here.

Now also, in Mac Info, monitor status is still shown 1080p

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06-03-2021, 10:29 AM	#1
tommiy Member Join Date: Mar 2018 Posts: 92	Looking at my neighbours set up of: M1->D6000->LG 4k And the interesting part is with just a single monitor connected via HDMI from the dock if you do not load the DisplayLink Manager the Mac has the options of various HiDPI resolutions but at 30Hz. So in this mode he can select 2560x1440@30 Hz HiDPI. If you start the 1.4 Displaylink Driver then all the HiDPI options are removed and replaced with lowres @60hz versions. So to me it appears that its the driver. No idea why with a single monitor the driver removes the HiDPI settings that are available without the driver.

06-06-2021, 07:48 AM	#3
DmitryAE Junior Member Join Date: May 2021 Posts: 20	Just want to add my review. I've worked a lot the last couple of days and noticed that there is no difference in performance between native 4k (1440p HiDPI) and 2560x1440 (low resolution). I'm waiting 1440p HiDPI with same performance. Thanks.

06-06-2021, 12:39 PM	#4
fabianotessarolo Junior Member Join Date: Jun 2021 Posts: 1	Hi Folks, Here my setup is m1->D6000-> Dell 4k+ LG 4k. Before BigSur 11.4 my setup was showing 4k support, after update to 11.4 it shown only 1080p. I've updated the driver and now I see this low res message, I'm little lost here. Now also, in Mac Info, monitor status is still shown 1080p