If it's not supported, then I'm afraid this should be closed as wontfix.
But I don't really know the official stance, so I'll just set it to
'new'
** Changed in: gnome-session (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/820328
Title:
Unity depends on gdm as a desktop manager and gives empty screen in
ldm
Status in “gnome-session” package in Ubuntu:
New
Bug description:
Under Natty, the file /etc/X11/Xsession.d/65compiz_profile-on-session
reads as follows:
--------------------
# This file is sourced by Xsession(5), not executed.
# Select unity profile if we are in the default session.
# The default profile is used otherwise.
if [ "x$GDMSESSION" = "xgnome" ]; then
COMPIZ_CONFIG_PROFILE="ubuntu"
export COMPIZ_CONFIG_PROFILE
fi
----------------
The purpose of this script is to enable the Unity plugin in compiz in
the default session (where there is no gnome-shell or -panel) so that
the Unity shell is activated. There are two problems with this script:
1) The first one being that it depends on the environment variable
$GDMSESSION being set while /etc/X11/Xsession runs. This leads to
problems on LTSP clients where LDM instead of GDM is used so that
there is no variable $GDMSESSION. (This problem could be solved in the
ldm package by adding a script to /usr/share/ldm/rc.d but this
wouldn't solve the problem for other desktop managers.) In Oneiric,
the environment $DESKTOP_SESSION is used instead of $GDMSESSION but I
am not sure whether this should be set by all desktop managers.
2) The second problem with this script is that enabling the Unity
plugin depends on the session being named "gnome". This means that one
cannot rename the session in /usr/share/xsessions without breaking
Unity or one cannot easily install a second Unity session in this
directory.
A solution would be to enable the Unity plugin while gnome-session is
processing the file /usr/share/gnome-session/sessions/ubuntu.session,
although I don't know how to hook a script in a gnome-session session
file.
Marc
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