Public bug reported:
The 'Cancel' Button has no effect.
Additionally on authentication failures the GUI is not restarting with the
prompt for the username, but continues to ask for a password in a endless loop.
So entering a wrong username will make lightdm unusable, as one can not correct
this.
/etc/lightdm/lightdm.conf:
[SeatDefaults]
greeter-session=lightdm-gtk-greeter
user-session=xubuntu
greeter-hide-users=true
allow-guest=false
/var/log/lightdm/lightdm.log:
[+0.13s] DEBUG: Logging to /var/log/lightdm/x-0-greeter.log
[+0.13s] DEBUG: Session 19873 running command
/usr/lib/lightdm/lightdm-greeter-session /usr/sbin/lightdm-gtk-greeter
[+0.34s] DEBUG: Greeter connected version=1.2.0
[+0.34s] DEBUG: Greeter connected, display is ready
[+0.34s] DEBUG: New display ready, switching to it
[+0.34s] DEBUG: Activating VT 7
[+0.59s] DEBUG: Greeter start authentication
[+0.59s] DEBUG: Started session 19918 with service 'lightdm', username '(null)'
[+0.60s] DEBUG: Session 19918 got 1 message(s) from PAM
[+0.60s] DEBUG: Prompt greeter with 1 message(s)
[+14.31s] DEBUG: Continue authentication
[+14.31s] DEBUG: Session 19918 got 1 message(s) from PAM
[+14.31s] DEBUG: Prompt greeter with 1 message(s)
[+16.38s] DEBUG: Continue authentication
[+18.69s] DEBUG: Session 19918 authentication complete with return value 7:
Authentication failure
[+18.69s] DEBUG: Authenticate result for user test: Authentication failure
[+18.69s] DEBUG: Session 19918 exited with return value 1
[+18.81s] DEBUG: Greeter start authentication for test
[+18.81s] DEBUG: Started session 19921 with service 'lightdm', username 'test'
[+18.82s] DEBUG: Session 19921 got 1 message(s) from PAM
[+18.82s] DEBUG: Prompt greeter with 1 message(s)
[+21.05s] DEBUG: Continue authentication
[+23.83s] DEBUG: Session 19921 authentication complete with return value 7:
Authentication failure
[+23.83s] DEBUG: Authenticate result for user test: Authentication failure
[+23.83s] DEBUG: Session 19921 exited with return value 1
[+23.97s] DEBUG: Greeter start authentication for test
[+23.97s] DEBUG: Started session 19922 with service 'lightdm', username 'test'
[+23.98s] DEBUG: Session 19922 got 1 message(s) from PAM
[+23.98s] DEBUG: Prompt greeter with 1 message(s)
[+26.11s] DEBUG: Continue authentication
[+28.24s] DEBUG: Session 19922 authentication complete with return value 7:
Authentication failure
[+28.24s] DEBUG: Authenticate result for user test: Authentication failure
[+28.24s] DEBUG: Session 19922 exited with return value 1
[+28.32s] DEBUG: Greeter start authentication for test
[+28.32s] DEBUG: Started session 19923 with service 'lightdm', username 'test'
[+28.33s] DEBUG: Session 19923 got 1 message(s) from PAM
[+28.34s] DEBUG: Prompt greeter with 1 message(s)
[+30.97s] DEBUG: Continue authentication
[+32.32s] DEBUG: Session 19923 authentication complete with return value 7:
Authentication failure
[+32.32s] DEBUG: Authenticate result for user test: Authentication failure
[+32.32s] DEBUG: Session 19923 exited with return value 1
[+32.42s] DEBUG: Greeter start authentication for test
[+32.42s] DEBUG: Started session 19924 with service 'lightdm', username 'test'
[+32.43s] DEBUG: Session 19924 got 1 message(s) from PAM
[+32.43s] DEBUG: Prompt greeter with 1 message(s)
[+35.68s] DEBUG: Continue authentication
[+38.24s] DEBUG: Session 19924 authentication complete with return value 7:
Authentication failure
[+38.24s] DEBUG: Authenticate result for user test: Authentication failure
[+38.24s] DEBUG: Session 19924 exited with return value 1
[+38.29s] DEBUG: Greeter start authentication for test
[+38.30s] DEBUG: Started session 19925 with service 'lightdm', username 'test'
[+38.30s] DEBUG: Session 19925 got 1 message(s) from PAM
[+38.30s] DEBUG: Prompt greeter with 1 message(s)
[+40.53s] DEBUG: Cancel authentication
[+40.53s] DEBUG: Session 19925: Sending SIGTERM
/var/log/lightdm/x-0-greeter.log:
(lightdm-gtk-greeter:19902): Gtk-WARNING **: Theme parsing error:
gtk-widgets.css:1175:60: Failed to open file
'/usr/share/themes/Greybird-lightdm/gtk-2.0/resize_grip.png': No such file or
directory
(lightdm-gtk-greeter:19902): Gtk-WARNING **: Theme parsing error: gtk-
widgets.css:1240:50: Failed to open file '/usr/share/themes/Greybird-
lightdm/gtk-3.0/progressbar.png': No such file or directory
(lightdm-gtk-greeter:19902): Gtk-WARNING **: Theme parsing error:
gtk.css:76:29: Failed to import: Error opening file: No such file or
directory
(lightdm-gtk-greeter:19902): Gtk-WARNING **: Theme parsing error:
gtk.css:77:33: Failed to import: Error opening file: No such file or
directory
# lsb_release -rd
Description:Ubuntu precise (development branch)
Release:12.04
# dpkg -l *lightdm*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==
