Help can't login!

[Colin Law]

On 16 September 2013 10:18, Pete Smout <smoutpete at gmail.com> wrote:
> Hi,
>
> Thanks for confirming my hunch that it's not passwd related! I have
> made a 3rd user with full privileges, I have also run 'sudo chown -R
> pete:pete /home/pete' which did not produce any output or errors and
> did take approx 10 sec to complete.
>
> Having tried to post logs requested in this mail, and the mail
> bouncing due to being over size! I will paste lightdm.log here (note
> maybe a failed login at start of log due to clumsy fingers!) and
> .Xsession onto pastebin link at bottom of post. HMMM file too big for
> pastebin as well, will look into and remove duplicate lines then put
> on here!
>
> Light DM log:
>
> [+0.13s] DEBUG: Logging to /var/log/lightdm/lightdm.log
> [+0.13s] DEBUG: Starting Light Display Manager 1.6.0, UID=0 PID=1463
> [+0.13s] DEBUG: Loaded configuration from /etc/lightdm/lightdm.conf
> [+0.13s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
> [+0.13s] DEBUG: Registered seat module xlocal
> [+0.13s] DEBUG: Registered seat module xremote
> [+0.13s] DEBUG: Adding default seat
> [+0.13s] DEBUG: Starting seat
> [+0.13s] DEBUG: Starting new display for greeter
> [+0.13s] DEBUG: Starting local X display
> [+0.16s] DEBUG: X server :0 will replace Plymouth
> [+0.20s] DEBUG: Using VT 7
> [+0.20s] DEBUG: Logging to /var/log/lightdm/x-0.log
> [+0.20s] DEBUG: Writing X server authority to /var/run/lightdm/root/:0
> [+0.20s] DEBUG: Launching X Server
> [+0.20s] DEBUG: Launching process 1503: /usr/bin/X :0 -core -auth
> /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background
> none
> [+0.20s] DEBUG: Waiting for ready signal from X server :0
> [+0.20s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
> [+0.20s] DEBUG: Registering seat with bus path
> /org/freedesktop/DisplayManager/Seat0
> [+4.26s] DEBUG: Got signal 10 from process 1503
> [+4.26s] DEBUG: Got signal from X server :0
> [+4.26s] DEBUG: Stopping Plymouth, X server is ready
> [+4.29s] DEBUG: Connecting to XServer :0
> [+4.29s] DEBUG: Starting greeter
> [+4.30s] DEBUG: Started session 1520 with service 'lightdm-greeter',
> username 'lightdm'
> [+5.54s] DEBUG: Session 1520 authentication complete with return value
> 0: Success
> [+5.54s] DEBUG: Greeter authorized
> [+5.54s] DEBUG: Logging to /var/log/lightdm/x-0-greeter.log
> [+5.59s] DEBUG: Session 1520 running command
> /usr/lib/lightdm/lightdm-greeter-session /usr/sbin/unity-greeter
> [+6.84s] DEBUG: Greeter connected version=1.6.0
> [+6.84s] DEBUG: Greeter connected, display is ready
> [+6.84s] DEBUG: New display ready, switching to it
> [+6.84s] DEBUG: Activating VT 7
> [+14.51s] DEBUG: Greeter start authentication for test
> [+14.51s] DEBUG: Started session 1865 with service 'lightdm', username 'test'
> [+14.71s] DEBUG: Greeter start authentication for test
> [+14.71s] DEBUG: Session 1865: Sending SIGTERM
> [+14.71s] DEBUG: Started session 1866 with service 'lightdm', username 'test'
> [+14.71s] DEBUG: Session 1865 terminated with signal 15
> [+14.71s] DEBUG: Session 1865 failed during authentication
> [+14.79s] DEBUG: Session 1866 got 1 message(s) from PAM
> [+14.79s] DEBUG: Prompt greeter with 1 message(s)
> [+136.08s] DEBUG: Greeter start authentication for pete
> [+136.08s] DEBUG: Session 1866: Sending SIGTERM
> [+136.08s] DEBUG: Started session 5469 with service 'lightdm', username 'pete'
> [+136.08s] DEBUG: Session 1866 terminated with signal 15
> [+136.08s] DEBUG: Session 1866 failed during authentication
> [+136.09s] DEBUG: Session 5469 got 1 message(s) from PAM
> [+136.09s] DEBUG: Prompt greeter with 1 message(s)
> [+141.47s] DEBUG: Continue authentication
> [+141.54s] DEBUG: Session 5469 authentication complete with return
> value 0: Success
> [+141.54s] DEBUG: Authenticate result for user pete: Success
> [+141.55s] DEBUG: User pete authorized
> [+141.57s] DEBUG: Greeter requests session ubuntu
> [+141.57s] DEBUG: Using session ubuntu
> [+141.57s] DEBUG: Stopping greeter
> [+141.57s] DEBUG: Session 1520: Sending SIGTERM
> [+141.61s] DEBUG: Session 1520 exited with return value 0
> [+141.61s] DEBUG: Greeter quit
> [+141.64s] DEBUG: Dropping privileges to uid 1000
> [+141.64s] DEBUG: Calling setresgid
> [+141.64s] DEBUG: Calling setresuid
> [+141.64s] DEBUG: Restoring privileges
> [+141.64s] DEBUG: Calling setresuid
> [+141.64s] DEBUG: Calling setresgid
> [+141.64s] DEBUG: Dropping privileges to uid 1000
> [+141.64s] DEBUG: Calling setresgid
> [+141.64s] DEBUG: Calling setresuid
> [+141.64s] DEBUG: Writing /home/pete/.dmrc
> [+141.73s] DEBUG: Restoring privileges
> [+141.73s] DEBUG: Calling setresuid
> [+141.73s] DEBUG: Calling setresgid
> [+141.80s] DEBUG: Starting session ubuntu as user pete
> [+141.80s] DEBUG: Session 5469 running command
> /usr/sbin/lightdm-session gnome-session --session=ubuntu
> [+141.83s] DEBUG: Registering session with bus path
> /org/freedesktop/DisplayManager/Session0
> [+141.83s] DEBUG: Greeter closed communication channel
> [+141.83s] DEBUG: Session 5469 exited with return value 1
> [+141.83s] DEBUG: User session quit

I think this is the significant section, it has authorized ok but then
failed to start the session correctly.

> [+141.83s] DEBUG: Stopping display
> [+141.83s] DEBUG: Sending signal 15 to process 1503
> [+141.95s] DEBUG: Process 1503 exited with return value 0
> [+141.95s] DEBUG: X server stopped
> [+141.95s] DEBUG: Removing X server authority /var/run/lightdm/root/:0
> [+141.95s] DEBUG: Releasing VT 7
> [+141.95s] DEBUG: Display server stopped
> [+141.95s] DEBUG: Switching to greeter
> [snip]
>
>
> Xsession.errors File too large for pastebin, will trim and paste
> relevant info here

That should be .xsession-errors, not Xsession.errors.  The fact that
it is large is suggestive of a problem.  If  you need to trim it make
sure you include the stuff at the start of the file up to the point
something seems to be going wrong.  Obviously the one to be posted is
from the user that fails to login.

Colin