4.3 Beta 3: Java Apps crash on launch if connected to external DisplayLink device
 

Hi there,

4.3 beta 3 looks good so far, except I noticed some Java apps I normally use failed to launch. I even figured it was Java itself and re-installed it many times with the same issues.

As it turns out, when the DisplayLink device is not connected, the Java apps will launch correctly.

How to reproduce:

1. Connect first monitor as normal
2. Connect second monitor via Diamond BVU 195
3. Ensure DisplayLink 4.3 beta 3 software driver is installed
4. Properly set up as "Using separate display" in AirPlay
5. Go to "System Preferences" app
6. Open "Java" preference pane
* Notice Java Control Panel should open, but doesn't
7. Click "Reopen the Java Control Panel" button
* Again notice Java Control Panel does not open
8. Try with other AWT-based Java apps (one example below with crash log)
9. Disconnect DisplayLink device
10. Click "Reopen the Java Control Panel" button
* Notice now this opens without issues

Example output from command line attempt to run yEd graph editor from: https://www.yworks.com/products/yed/download

So again-- this seems to be an issue relevant to the new DisplayLink driver, and not related either to Java itself nor the Java apps I'm trying to run.

If you could provide a solution, I would appreciate it. Thank you.

Having same issue here
 

Having the same issue.

Whenever I try to launch Java GUI apps (java 1.8) while connected to DisplayLink it crashes.
java.lang.NullPointerException
at java.awt.Window.init(Window.java:497)
at java.awt.Window.<init>(Window.java:537)
at java.awt.Frame.<init>(Frame.java:420)
at java.awt.Frame.<init>(Frame.java:385)
at javax.swing.SwingUtilities$SharedOwnerFrame.<init> (SwingUtilities.java:1758)
at javax.swing.SwingUtilities.getSharedOwnerFrame(Swi ngUtilities.java:1833)


./bin/java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

If I unplug the DisplayLink then start, the app comes up without any issue and will continue to run even after I plug DisplayLink back in.

Display Link Version:
Version: 4.3 (124)
Last Modified: 6/18/18, 9:29 AM
Bundle ID: com.displaylink.driver.DisplayLinkDriver
Loaded: Yes
Get Info String: DisplayLink Driver 4.3.124 - Copyright © 2003 - 2018 DisplayLink (UK) Ltd. All rights reserved.
Obtained from: Identified Developer
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /Library/Extensions/DisplayLinkDriver.kext
Kext Version: 4.3 (124)
Load Address: 18446743521820100000
Loadable: Yes
Dependencies: Satisfied
Signed by: Developer ID Application: DisplayLink Corp (73YQY62QM3), Developer ID Certification Authority, Apple Root CA


MacOS version:
System Version: macOS 10.13.5 (17F77)
Kernel Version: Darwin 17.6.0

Thank you so much for highlighting this! I use a bunch of JetBrains applications for work to develop JavaEE stuff all on a DisplayLink dock. Sounds like I need to avoid the new driver like the plague for now!!

Same issue here.

macOS: 10.14.3
DisplayLink Driver: 5.1
Java: 1.8.0_201-b09

Reproduce via terminal:

Output is:

Workaround is to start app from macBook screen (configured as main screen).

Somewhat of a workaround - for anyone still experiencing this
 

If I make my macbook monitor the primary display then Java AWT applications can start without the error.

Still a bit of an annoyance as I don't use the laptop monitor much while docked (and now apps want to default to that screen) but at least I can open java apps with this configuration.
System Preferences > Displays > Arrangement tab > drag the title bar to your laptop display.

Hope that might be useful as a workaround for folks that are still seeing this issue, and perhaps a clue to DL team on where the problem might be.

Working fine with update
 

Hi buddy, did you try upgrading as doing so is working fine for me as of now.

Re: Working fine with update
 

Which update are you referring to that works? I have 5.1.32 and I'm still unable to open Java apps on my DisplayLink screens. If I move to the actual laptop screen and open, it works fine.

Still seeing the same behavior
 

Just re-tested to confirm that yes I am still seeing the same issue.
Currently on Mojave 10.14.6 with Display link 5.2 (15).

There is a fix in recent JDK 14 Early Access.
Can you verify it?

You can follow specific instruction README file that together with a fixed jdk and test tool can be found here:
https://displaylinkltd-my.sharepoint...nkJava%5F29193

Also experiencing the same issue
 

Hello, I'm new on this forum, but I would just like to point out that my co-workers and I are all experiencing this same issue (on Mojave and Catalina) with Displaylink 5.1.

There is fix in recent open jdk.
Can you download that file https://www.displaylink.com/downloads/file?d=263
and follow instructions from README?

Java apps keep crashing
 

We're running macOS Mojave, fully updated, with amazon Corretto 8 JDK. When users launch Oracle's SQLDevelper app while plugged into their Targus DisplayLink docks, the app crashes 100% of the time. The SQLDeveloper app is built on Java so this definitely counts as a problem. I tried using the DisplayLinkJavaTest.jar, but I get the following error when I try to run the test:
We cannot upgrade to JDK 14 due to contractual and security constraints.This is a major problem for us. We just bought 170 Targus docks and we can't use a single one because of this mission critical app crashing.

Still issues
 

I am sorry for the very late reply, but I have been out of office for a while.

I have tried the build 19 and the newest build 26, both of them pass on all the tests given by DisplayLinkJavaTest.jar but neither of them fixes my issue.
After changing to build 19, java-based softwares started but then went into an everlasting "Application Not Responding", and upon a reboot of the computer these softwares don't start at all, they just crash upon opening them, just like before. This same thing happened with build 26.

This has only been tested on MacOS 10.14.6 though, as this is the system I am using.

Regards,

Timothy

How about build 18?
Does it pass all tests from DisplayLinkJavaTest.jar ? I expect they don't as this is a build without a fix.
This is important thing to understand the problem. If we will know that we can push java guys to port the fix to older jdk. Please keep in mind that this is early development(unstable) build of jdk and other java issues you are experiencing are expected.

Can you test your setup with the development builds (18 and 19) of jdk?
This is important as we need to know if the fix that Oracle supplied is sufficient. If so we can push them to port it to older jdk version.

We cannot. We are strictly locked in to JDK 8. Not even for testing purposes.

Sorry, but I am unable to locate a download for build 18. Do you know where I can find it?

5.2.1
 

I should clarify that we are running macOS Mojave 10.14.6 and DisplayLink 5.2.1 and this problem still exists. We need a solution to this.

DisplayLink 4.3 causing Java apps to crash on Catalina
 

I am also having this problem. It's been driving me absolutely CRAZY; my Java apps have been crashing and I had no idea that the DisplayLink drivers were causing the issue.

I removed the DL hardware from my system and wha-la! All of my apps are now working perfectly.

@DisplayLink--please fix this issue ASAP. I am not able to use my expensive Targus dock now, which is not making me very happy about the investment.

Fix was back-ported to Java SE Development Kit 8u231.
Please update your java installation.

If you need the bug back ported to other jdk please contact Oracle.
Please use that jdk bug as reference:
https://bugs.openjdk.java.net/browse/JDK-8223158

I have downloaded and installed update 8u241 (which is also supposed to have the bug-fix) but it is still not working. Do you need any data from me to have a look at this particular case?