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

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Shane Snover
Shane Snover 2018-9-3
回答： Hugo Diaz 2019-11-28
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 个评论
Shane Snover
Shane Snover 2018-9-3
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 2018-9-26
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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回答（3 个）

Akshay Khadse
Akshay Khadse 2018-9-10
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 2019-7-17
I have same problems here (same matlab version too). I don't know how fix it.
Hugo Diaz
Hugo Diaz 2019-11-28
This works for me, Ubuntu 18. HTMLRENDERER, also works but it looks horrible.
com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLPANEL');

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