Linux 18.04: Segmentation fault (core dumped) and plenty of problems with Property Inspectors

Hi,

My operating system is linux 18.04. Since the installation of Matlab2019a on my system, I've had problems opening property inspectors of figures. For instance to change colors, I was using following command which I had found on Mathworks forums:

s = settings;
oldcolorpicker = 'matlab.ui.internal.dialog.ColorChooser';
s.matlab.ui.dialog.uisetcolor.ControllerName.TemporaryValue = oldcolorpicker;

Today, again I searched and I found this command which was giving access to property inspectors:

s = settings
s.matlab.web.LightweightBrowserDefaultType.PersonalValue = 'cef';

However, despite the successful execution of the command and the fact that property inspectors could be used, soon after I started having plenty of issues. Matlab became unresponsive. And following errors were shown on terminal :

Segmentation fault (core dumped) 

or

[0406/180945.377663:WARNING:stack_trace_posix.cc(626)] Failed to open file: /tmp/jna--1081292729/jna223269650053268758.tmp (deleted)
  Error: No such file or directory

or

[0406/161426.961453:WARNING:stack_trace_posix.cc(626)] Failed to open file: /tmp/jna--1081292729/jna5850602593361995881.tmp (deleted)
Error: No such file or directory
[0406/161427.116862:ERROR:sandbox_linux.cc(343)] InitializeSandbox() called with multiple threads in process gpu-process. 
[0406/161427.712723:ERROR:cert_verify_proc_nss.cc(918)] CERT_PKIXVerifyCert for localhost failed err=-8179
[0406/161518.492328:ERROR:object_proxy.cc(583)] Failed to call method: org.gnome.SessionManager.Inhibit: object_path= /org/gnome/SessionManager: org.gnome.SessionManager.GeneralError: Application ID not specified
[0406/161518.492349:ERROR:power_save_blocker_x11.cc(335)] No response to Inhibit() request!
[0406/161548.659507:ERROR:object_proxy.cc(583)] Failed to call method:
 org.gnome.SessionManager.Uninhibit: object_path= /org/gnome/SessionManager: org.gnome.SessionManager.GeneralError: Unable to uninhibit: Invalid cookie
[0406/161548.659585:ERROR:power_save_blocker_x11.cc(407)] No response to Uninhibit() request!
[0406/161618.692303:ERROR:object_proxy.cc(583)] Failed to call method:

So, the question is how to fix this problem.

Thanks in advance for your help,

Regards,

Mary

[mary]

The only way that I can make Matlab working for one hour is to go to /usr/local/MATLAB/R2019a/bin and execute activate_matlab.sh !!!!