gdm2.20-2.20.8-alt6 In Simply Linux beta 2011-08-11, where there was only Xfce and it was the default desktop env and window manager, I've apt-get-installed WindowMaker-0.94.0-alt2 and xmonad-0.9.2-alt2 additionally. After that, the "default" session in gdm started to call xmonad, even for those users who previously used Xfce (as the former "default"). This is a trouble for the administrator that installing additional window managers changes the meaning of the "default" option. The installation of additional window managers shouldn't change the default.