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
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.
The previously linked page Some applications on Ubuntu 19.10 very slow to start, provides solutions that worked for me.
(Temporary Solution) Launch the program as the superuser:
(Temporary Solution) Launch the application with launch:
dbus-launch --exit-with-session ./project1
(Permanent Solution) Run the following command and restart your computer:
sudo apt-get install appmenu-gtk2-module