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Since I have installed Ubuntu 19.10 and lazarus 2.0.2 package, when I want to run Lazarus IDE, I have 30 seconds delay and then ubuntu freezes , mouse and keyboard no respond. Can everybody help me Thanks

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Unfortunately, it seems that Ubuntu 19.10 it experiencing some difficulties with Gtk2 applications, for some people (e.g. Some applications on Ubuntu 19.10 very slow to start).

I had the same experience you did (except using Lazarus 2.0.6 distributed from the Lazarus web page), as have others (see https://forum.lazarus.freepascal.org/index.php/topic,47240.0.html).

The only way I was able to get Lazarus to work acceptably was to use fpcupdeluxe to build the Qt5 version of Lazarus, which seems to perform fine under 19.10.

  • Thank you. I will wait for better use of Gtk2 – G.Barbier Nov 22 at 16:22
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The previously linked page Some applications on Ubuntu 19.10 very slow to start, provides solutions that worked for me.

  1. (Temporary Solution) Launch the program as the superuser:

    sudo ./project1
    
  2. (Temporary Solution) Launch the application with launch:

    dbus-launch --exit-with-session ./project1
    
  3. (Permanent Solution) Run the following command and restart your computer:

    sudo apt-get install appmenu-gtk2-module
    
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