Bug#950174: Fwd: 950174 resolved!
HI after much research and knowing that the problem does not arise on new installations, I searched for all the old configuration files In the X11 folder /etc/X11/Xsession.d/ there were files from 2010 and trying to associate each file with the package they were installed from.. I found the file
Bug#920139:
HI i had a similar problem with my install done many years ago; I fixed it by deleting the outdated package desktop-profiles I hope it can help you Greetings Gianluca