MATLAB Answers

Matlab R2019b no window manager on Ubuntu 18.04

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Joao Fayad
Joao Fayad on 28 Mar 2020
Edited: Joao Fayad on 15 Apr 2020
Hi,
Recently when I start matlab the application has no window manager i.e. no top bar, minimize/maximize buttons etc. Even the keyboard shortcuts for these actions have no effect. This behaviour started recently and I am not sure why or how to find the root cause. Does anyone have any hints?
Thanks in advance.

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Answers (1)

Anurag Agrawal
Anurag Agrawal on 31 Mar 2020
Try these workarounds
1. Refresh the file system caches using the following commands:
>> restoredefaultpath
>> rehash toolboxcacheno
2. Kill the process. Then right-click on the icon and use Run as Administrator and see if you get anywhere. If it works, then you should not need to Run as Administrator in the future, just the once.
3. Also make sure you have installed it properly.
If this doesn't solve your issue, you can create a service request here:

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Joao Fayad
Joao Fayad on 2 Apr 2020
Unfortunatley those steps did not work. I will try a reinstall when I find some time as a last resort.
Thanks.
Anurag Agrawal
Anurag Agrawal on 2 Apr 2020
Yeah, looks like it's an installation issue.
Joao Fayad
Joao Fayad on 15 Apr 2020
I took the opportunity to intall MATLAB R2020a and the issue still remains :(
I get the "Failed to load module "canberra-gtk-module"" error at start. Not sure if it has any relation.
EDIT:
I forgot to say I connect my laptop to a secondary screen. After initializing MATLAB without the screen connected it came on with a window manager. After this I have been able to get it both with and without a window manager when using the external screen. At least now I have a workaround.

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