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Old 05-09-2018, 09:29 AM   #1
tjgrant
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Join Date: Apr 2017
Posts: 4
Default 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

Code:
xxx-MacBook-Pro:Applications xxx$ ./yEd.app/Contents/MacOS/yEd 
Exception in thread "main" 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 com.yworks.A.P.R.<init>(Unknown Source)
	at com.yworks.A.D.ć(Unknown Source)
	at com.yworks.A.D.Ă(Unknown Source)
	at com.yworks.A.D.ā(Unknown Source)
	at com.yworks.A.yEd.ā(Unknown Source)
	at com.yworks.A.yEd.main(Unknown Source)
2018-05-09 02:15:57.135 yEd[14949:336028] yEd:Failed to launch JVM
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.

Last edited by tjgrant; 05-09-2018 at 09:32 AM.
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Old 07-09-2018, 05:04 PM   #2
Jjk
Junior Member
 
Join Date: Jul 2018
Posts: 1
Default 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
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Old 07-19-2018, 09:56 PM   #3
Gudd
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Join Date: Jul 2018
Posts: 10
Default

Quote:
Originally Posted by tjgrant View Post
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.
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!!
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