ldm does not show sessions and cannot start gnome-fallback session

[Rüdiger Kupper]

I have recently upgraded my LTSP server to quantal. I have created a new thin client chroot with the ltsp-create-client script.

The thin client boots up fine, but the ldm login screen does not show the correct list of sessions:
It shows "xterm" and "Ubuntu" only, although gnome-fallback and gnome-classic are present on the server.

ldminfod on the server returns:

[...]
session:gnome-session --session=gnome-classic
session:gnome-session --session=gnome-fallback
session:gnome-session --session=ubuntu
session-with-name:GNOME Classic:gnome-session --session=gnome-classic
session-with-name:GNOME Classic (No effects):gnome-session --session=gnome-fallback
session-with-name:Ubuntu:gnome-session --session=ubuntu
xsession:/etc/X11/Xsession

So ldminfod detects the sessions all right, but the client does not show them on the login screen.

Putting LDM_SESSION="gnome-session --session=gnome-fallback" into lts.conf leads to message 'Failed to load session "gnome-fallback"'. So there seems to be a real problem starting the session. However, on the server, I can manually start "gnome-session --session=gnome-fallback" and it woks fine.

Why does ldm not detect and/or start the installed sessions?

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ldm-server 2:2.2.11-1
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
Date: Tue Oct 23 15:44:38 2012
PackageArchitecture: all
SourcePackage: ldm
UpgradeStatus: Upgraded to quantal on 2012-10-20 (2 days ago)

[Rüdiger Kupper (ruediger.kupper)]

Note: I can connect via netcat to the server on port 9571 and get the same output from ldminfod as shown above.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rüdiger Kupper (ruediger.kupper)]

Update: I believe the problem has been fixed in quantal.

[Roland Giesler (lifeboy)]

I installed the ldm from https://launchpad.net/~ltsp-upstream/+archive/daily, but the problem persists. As a workaround I have removed Unity, but at some stage I will have to put it back and continue testing.

[Alkis Georgopoulos (alkisg)]

If someone still has this issue, what's the output of this command?
sudo ltsp-info

LDM_SESSION="gnome-fallback" is the correct lts.conf entry.

[Launchpad Janitor (janitor)]

[Expired for ldm (Ubuntu) because there has been no activity for 60 days.]