On Linux, MATLAB editor and command window freeze when a help window is closed

I'm using Ubuntu 18.04 and MATLAB r2018a. When I pull up a help window using for example `doc magic` and then close this window with the 'X' button in the GUI, the whole MATLAB GUI freezes. It appears that I am still able to type in them, as evidenced by some of my typing being present upon restarting MATLAB in my *.m file. I am not sure how to debug this further, as it appears to purely be a GUI problem. In the terminal which I used to start MATLAB, there is no additional output.

The only output to the terminal I have appears on startup:

Gtk-Message: 18:05:40.313: Failed to load module "canberra-gtk-module"

[Shane Snover]

Actually, while I typed up this question I let it sit frozen for a while and it unfroze. In the Command Window I found the following exception text:

Exception in thread "AWT-EventQueue-0" com.teamdev.jxbrowser.chromium.internal.ipc.IPCException: Failed to execute shutdown post message.
  at com.teamdev.jxbrowser.chromium.internal.ipc.IPC.c(Unknown Source)
  at com.teamdev.jxbrowser.chromium.internal.ipc.IPC.stop(Unknown Source)
  at com.teamdev.jxbrowser.chromium.Browser.a(Unknown Source)
  at com.teamdev.jxbrowser.chromium.Browser.dispose(Unknown Source)
  at com.mathworks.html.jxbrowser.chromium.JxBrowserChromiumComponent.doBrowserDisposal(JxBrowserChromiumComponent.java:96)
  at com.mathworks.html.jxbrowser.chromium.JxBrowserChromiumComponent.access$400(JxBrowserChromiumComponent.java:20)
  at com.mathworks.html.jxbrowser.chromium.JxBrowserChromiumComponent$RemoveRunnable.run(JxBrowserChromiumComponent.java:82)
  at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
  at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
  at java.awt.EventQueue.access$500(EventQueue.java:97)
  at java.awt.EventQueue$3.run(EventQueue.java:709)
  at java.awt.EventQueue$3.run(EventQueue.java:703)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[Aidan Farrell]

Workaround that worked for me: com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLRENDERER');

If you need to un-freeze now, find the Linux process called "jxbrowser-chromium", and (If your problem is the same as mine), kill the non-defunct one.

Answer 1

[Akshay Khadse]

MATLAB R2018a is not yet supported on Ubuntu 18.04.

Please refer the System Requirements page to know more about the currently supported Linux distributions.

Answer 2

[Rubem Pacelli]

I have same problems here (same matlab version too). I don't know how fix it.

[Rubem Pacelli]

Try type this code:

com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLRENDERER');

Answer 3

[Hugo Diaz]

This works for me, Ubuntu 18. HTMLRENDERER, also works but it looks horrible.

com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLPANEL');