Have you run
HTML Code:
sudo apt update -y && sudo apt full-upgrade -y && sudo apt dist-upgrade -y
after installation ubuntu
Have you checked if you have any broken packages
What is happen when you use USB mouse , Is the hanging issue still exist ??????
Have this issue appeared when you perform the installation of ubuntu ???????
Try to make some changes to the sources.list with taking a backup from the original sources.list file and see if the problem still exists
Hope it helps