I can issue commands on Debian Linux to "clear" this hanging state of the program. Sometimes, clearing this data and restarting a program can help me to continue using this program.
Recently, I upgraded LibreOffice to version 3.5.1. I started LibreOffice 3.5.1. The splash screen appeared and stopped. Nothing worked further.
My commands to clear this hanging program were:
ps aux | grep office
nameOfTheUser 9655 0.0 0.0 31952 2044 ? Sl 09:21 0:00 /opt/libreoffice3.5/program/oosplash --writer
nameOfTheUser 9672 0.1 2.1 187040 65252 ? Sl 09:21 0:00 /opt/libreoffice3.5/program/soffice.bin --writer
9655 and 9672 were the process IDs. I typed:
kill 9655 9672
I restarted LibreOffice and it worked. I did not know why it had stopped at first but I could use it then after "clearing" the hanging processes.
The "kill" command
"kill" is a command for stopping a process or processes. The "kill" command works well in Terminal.
I read this page for such skills.
If the "kill" command had not worked, I would have pressed Ctrl, Alt and Del at the same time to restart the machine.