10.15.6 - Non-functional with 5.2.4

[Richard.d]

Hello, I have just upgraded to macos 10.15.6
I am having the same problems as described above.
I am trying to use two monitors + my laptop screen with my Targus dock, all three screens work, however the two externals seem to be mirrored and only allow mouse to move across. They seem to be sharing the same "Space" for Mission Control.
I would expect Mission control spaces to show "Desktop 1" for laptop, "Desktop 2" for first screen, "Desktop 3" for the second screen ... however both external screens share "Desktop 2".
I dont think its the permissions issue as I have followed all the guides and Security and Privacy shows the correct permissions.

[altphil]

Edit: Possible WORKAROUND for some of you below in the update.

Ditto.

Dug in a little bit this morning.

First, the laptop screen works fine.
The 1st monitor creates a desktop, windows can exist on it, you can see the mouse, but you can't see anything because the 2nd monitor's desktop is displayed (mirrored) on the 1st monitor.
The 2nd monitor seems to work fine, besides mirroring it's display over the first monitor.

It's like the windowserver runs totally normal except it mirrors monitor #2's display on both monitor 1 and 2. You have this whole invisible desktop that should be on monitor 1.

The new displaylink manager app works great, as expected. But the "no rotation" thing makes it useless for my work station, which only fits on the desk with one monitor rotated.

It's certainly an issue. Going to suck at work until either the displaylinkmanager app can rotate or 10.15.6 is fixed with a new driver, I guess?


Update: (Workaround found for my case)
On my startech usb-c hub (DK30CH2DPPD), if I use the two Display ports output, I get the above issue. If I use one Display port for one monitor, and the one HDMI output for the other, it works totally like normal.
So it appears to be when you are using the first two outputs on the USB-C hub, you get the weird mirror effect.

I have it working now. Of course, now I have to go find an HDMI to DVI converter as I borrowed this one to test.

So there's a workaround. Sort of. If you can use different outputs, it seems to work. Apparently you can't use two of the same output types?

[mfiorentino]

I have updated to MacOS Version 10.15.6 (19G73).

The first thing I realized is that my Totu universal dock didn't worked with the screens, but it did charge my Mac.

In order to modify this situation I took the following steps.

1. I downloaded the Display Link Manager (Version 1.0, Released June 22, 2020) for Catalina 10.15.
https://www.displaylink.com/downloads/macos

And subsequently followed all the instructions.
Still no image. No display extension.

2. I clicked on LaunchPad.

3. I searched for DisplayLink.
This asked me to allow the the drivers/software/whatevers into the Security & Privacy section of Settings. That will request to close the program.

4. Repeat step 2. Now it should work.

5. Go straight to Settings>Display and figure out whether your external displays are being recognized. They should be recognised on step 4, but they will be disarranged.

Hopefully it works for you too!

[HectorLarks1]

I upgraded to Catalina 10.15.6. Apple introduces a new kext block list. Apple blocked 5.2.1 from running on Catalina 10.15.6 now.

I'm NOT going to 5.2.4. It is not stable at all. I use this product and I also have several clients that are DOWN because of this fiasco.

My workaround: Booted into Recovery mode. Ran csrutil disable in Terminal. Booted back to normal.

Everything after this do with sudo: Backed up these files (don't ever continue unless you have a fallback position):

sudo cp -v /Library/Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Info.plist /Library/Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Info.plist.old

sudo cp -v /Library/Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist /Library/Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist.old

Used a file editor to search and removed all keys and strings to "DisplayLink" in both files mentioned above.

Booted into Recovery mode. Ran csrutil enable in Terminal. Booted back to normal.

I have 5.2.1 running on Catalina 10.15.6. I'm sure I'll be dealing with this issue again when the next update happens but this time I can plan ahead and script around this.

Really getting fed up with this DisplayLink and Apple. I have $200+ wavlink units across 40 stations (office and home office) and can't have 5.2.4 instabilities.

[simonmason]

I have two MacBooks - Air and Pro - hooked to two Dell D6000's.

The Pro was running 10.15.5 and working fine, even in clamshell. It has one monitor hooked to it using HDMI to HDMI.

Then mysteriously it started playing up today. It is hooked to an LG widescreen with a resolution of 2560x1440 75Hz. DisplayLink insisted on setting resolution to 3840x2160.

I tried everything and it didn't work so I finally upgraded to 10.15.6. Clamshell no longer works - it displays for about 30 seconds and then goes blank, plays some sort of system sound and then comes back on and repeats this. Resolution still stuck at 3840x2160.

So I downloaded the SwitchResX utility and forced it to native resolution.

The MacBook Air has not worked in clamshell since I installed the 5.2.4 driver.

Fun!

[fullondan]

I've just purchased the dual 4k displaylink and have connected my monitors - a 27" Class UltraFine 5K IPS LED Monitor (27" Diagonal) and a Samsung LC27F398FWNXZA Samsung C27F398 27 Inch Curved LED Monitor, connected to a mac book pro running 10.15.6 Catalina

The displaylink manager shows the samsung monitor connected. It does not see the LG monitor.
There is no picture in the samsung monitor

Not sure if this could be related to what this thread is talking about. If anyone has any ideas about why it is not working, I would appreciate the feedback.

[lowvoltage]

I'm having the exact same problem, purchased a StarTech USB3DDOCKFT to run dual monitors on two different laptops. Everything works great with the HP, but he MAC Book Pro running 10.15.6. The dual monitors show, but when you try to arrange them, you don't see monitor 2 at all everything is on monitor 1 and is mirrored over to monitor 2. Mouse will move over to monitor 2 but you can't click or use the keyboard on Monitor 2, it's just mirroring the display of Monitor 1.

If I download the Display Link Manager it will work, but you can't use Display Link Manager and have the macbook closed,(a know issue) which is how I have my two laptops on my desk in a stand both closed.

[Displaced-Link]

Is there going to be a fix for this? Soon?

Without knowing about this problem, I purchased a brand new Totu Upgraded USB-C docking station for my brand new MacBook 2020.

Cannot get any external display to show. Even with the beta driver. I spent $200 on the dock, spent half a Sunday (1/4 of my weekend), and have nothing to show for it. If there isn't a fix very very soon, I'm returning the Totu. I'm not going to let $200 collect dust waiting for DisplayLink and Apple to figure out how to play nice.

Tomorrow at work (from home), I'll be hunched over staring at the tiny screen on the laptop that's sitting flat on my desk. As Bart Scott said, "Can't wait."

[KatarzynaCzaja]

Dear users,

If you experience issues with legacy driver 5.2.4 and mirroring screens please upgrade your driver to version 5.2.5 available under following link: https://www.displaylink.com/downloads/file?id=1636

Users having different issues please collect logfiles by following article under this link and send it to technical_enquiries@displaylink.com along with the description of the problem you are having.

Thank you,
Katarzyna

[am_mac]

Have been reading through all the comments but did not find this peculiar issue here.

My DP link works (both the ports) but HDMI does not, this is a docking station I recently purchased TOTU upgraded 4K and strange to see DP work (after following the protocol/steps) but the HDMI is not!

MAC OS 10.15.6
Display Manager 1.1.0
Build 54.91