The interesting fact is that it works while in Live session.
If you want to investigate it, I would suggest a few things (start with the third):
1) try to delete /etc/X11/xorg.conf and then restart the Xserver with "startx"
2) compare xorg.conf (if it exists at all) of Live and Installed sessions.
compare /var/log/Xorg.0.log of Live and installed sessions.
compare kldstat output, as above.
check dmesg for relevant messages
3) edit the file /boot/loader.conf and add the folliwing two lines at the bottom:
- Code: Select all
then reboot GhostBSD