pymol 1.6 beta is not stable. It can not label or set background colour.
when use ‘sudo python setup2.py uninstall’ to uninstall, some files will still not be deleted and affects other installation of pymol.
need to delete pymol in /usr/local/bin and /usr/bin
when new pymol installed with apt-get. pymol still can not run. then, make a link of /usr/bin/pymol to /usr/local/bin:
sudo ln pymol ../local/bin
then, it can work again.
pymol 1.4 is very stable.
apbs plugin can be used to plot the surface electric distribution.