[Trisquel-users] Netinstall with KDE fails with login message "Failed to load session 'ubuntu'"

[chuck]

Help!  After a positive initial experiment with Trisquel + KDE = Triskel, I  
wanted to make a clean install that corrected a few of my misunderstandings  
from the first install.  In both cases I used the netinstall version so I  
could select KDE.

The new installation appears to succeed and boots to the login prompt like  
the first installation; but now as soon as I log in I get the message "Failed  
to load session 'ubuntu'" and the only option presented is to log out.  I  
thought at first I had failed to install something by not checking all the  
options for things I didn't understand when the netinstall asks you to choose  
packages.

So I installed a third time, choosing every option presented except the  
Trisquel desktop environment, selecting the KDE environment instead.  The  
same thing happens.  Even the Failsafe option on login just flashes a console  
window for half a second and immediately logs me back out.

Any ideas?  My desktop is quite out of sorts over this whole thing;  
thankfully the netbook has kept its head.