Symptom:
After removing an AMD graphics card (to use onboard integrated graphics), Cinnamon crashes repeatedly after logging in.
Cause:
Cinnamon may still be referencing the old video drivers.
Solution:
Uninstall the proprietary AMD graphic card drivers.
Troubleshooting Steps:
- List installed AMD packages -> dpkg -l *fglrx*
- Remove the installed AMD packages and drivers with sudo apt-get purge. For example, sudo apt-get purge fglrx fglrx-amdcccle fglrx-core
References
http://forums.linuxmint.com/viewtopic.php?f=59&t=212547&p=1108855&hilit=uninstall+fglrx#p1108855