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

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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"
  2 Commenti
Shane Snover
Shane Snover il 3 Set 2018
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
Aidan Farrell il 26 Set 2018
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.

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Risposte (3)

Akshay Khadse
Akshay Khadse il 10 Set 2018
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.

Rubem Pacelli
Rubem Pacelli il 17 Lug 2019
I have same problems here (same matlab version too). I don't know how fix it.

Hugo Diaz
Hugo Diaz il 28 Nov 2019
This works for me, Ubuntu 18. HTMLRENDERER, also works but it looks horrible.
com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLPANEL');

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