darien@Unicrunch:~$ ls -l /usr/share/xsessions/
total 24
-rw-r--r-- 1 root root  53 Dec  6 13:15 custom.desktop
-rw-r--r-- 1 root root 103 Jun 16  2012 dwm.desktop
-rw-r--r-- 1 root root  86 Aug  6  2011 lightdm-xsession.desktop
-rw-r--r-- 1 root root 300 Mar 27  2013 openbox.desktop
-rw-r--r-- 1 root root 218 Mar 27  2013 openbox-gnome.desktop
-rw-r--r-- 1 root root 205 Mar 27  2013 openbox-kde.desktop
darien@Unicrunch:~$ dpkg -L dwm
/.
/usr
/usr/bin
/usr/bin/dwm.maintainer
/usr/bin/dwm.default
/usr/bin/dwm.winkey
/usr/bin/dwm.web
/usr/share
/usr/share/icons
/usr/share/icons/dwm.png
/usr/share/doc
/usr/share/doc/dwm
/usr/share/doc/dwm/README
/usr/share/doc/dwm/changelog.Debian.gz
/usr/share/doc/dwm/copyright
/usr/share/menu
/usr/share/menu/dwm
/usr/share/xsessions
/usr/share/xsessions/dwm.desktop
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/dwm.1.gz
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/dwm
/usr/share/man/man1/dwm.default.1.gz
/usr/share/man/man1/dwm.web.1.gz
/usr/share/man/man1/dwm.winkey.1.gz
/usr/share/man/man1/dwm.maintainer.1.gz
darien@Unicrunch:~$