I have looked at the solutions offered to this in the past, and mine seems a bit different
I have installed Enlightenment from Synaptic. It shows up in the Sessions chooser at boot-up.
When I choose Enlightenment, everything goes well to a point, and then the screen flashes, and the KDE desktop opens up per usual. Not enlightenment E-17. Regular PCLinuxOs.
Interestingly, I tried to run a live iso of Mandriva today, and the same thing happened. The computer said I was booting from the DVD, but instead, PCLinuxOs opened up after a brief flash.
Is there some way around this? From time to time I like to play around, but I seem to be frozen in the KDE desktop of PCLinuxOs, even when trying to boot from the DVD.