Fw: [Bug 1312526] Re: lightdm fails to start session unless user selects session
Stephen Michael Kellat
skellat at sdf.org
Sat Sep 13 20:21:48 UTC 2014
For those who think only Xubuntu gets harsh bug comments, presented is an example otherwise.
Stephen Michael Kellat
Begin forwarded message:
Date: Sat, 13 Sep 2014 19:58:30 -0000
From: Arvind Kumar <phenom.arvind at gmail.com>
To: skellat at sdf.org
Subject: [Bug 1312526] Re: lightdm fails to start session unless user
I lost my faith in ubuntu that they can deliver a good product.
lightdm does not restart ,xorg server does not start.
I had to format my machine.
Please resolve all these issue on priority people affected very badly
rather than releasing ubuntu 14.10.
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lightdm fails to start session unless user selects session
Status in “lightdm” package in Ubuntu:
Status in “lightdm-gtk-greeter” package in Ubuntu:
Status in “unity-greeter” package in Ubuntu:
I install using preseed files, and clobber a bit of /etc to configure
ubuntu to be suitable for users to login with network credentials. I
use pam to make a home directory when users login with network
On first boot, logging into the VTs works fine but I cannot log into
the lightdm dislpay manager. If I type my username and password
right, I get a "Failed to start session" message and get bounced back
to the start of the login process.
If, however, I click one of the session types, e.g. 'ubuntu' or
'fluxbox', then I can log in. (I've tried uninstalling fluxbox, this
doesn't seem to help). At which point I can login, which I believe
works until I reboot the machine. (I will test this shortly).
If I install the lightdm-gtk-greeter package then I do not encounter
this bug. Instead, I am automatically logged into the alphabetically
first session type (at least, if I've got fluxbox available vs. either
ubuntu or xfce, that seems to be what I get, if only ubuntu is install
I get an ubunut session by default so I assume the preference is
It does not seem to matter if I specify a
(I have also tried not setting user-session at all)
in lightdm.conf (well, I haven't tried it with the gtk-greeter, but it
doesn't matter with the unity greeter).
I've tried all of the other lightdm-greeter packages, and lightdm-
greeter-gtk is the only one that does not suffer from this bug.
the most relvant message in the logs I can find is:
DEBUG: Seat: Failed to find session configuration true
Seat: Can't find session 'true'
What I would expect to happen is to get some default session; getting
the alphabetically first session is kind-of/sort-of reasonable. Total
failure is not.
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
Date: Thu Apr 24 22:08:08 2014
session-setup-script=/bin/sh -l /etc/profile
UpgradeStatus: No upgrade log present (probably fresh install)
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