Package: lightdm
Version: 1.10.3-3
Severity: minor

when in a user's home directory a .Xauthority file exists that is owned
by root (which for example happens when trying to debug a non-starting x
server with sudo startx or from buggy desktop managers), lightdm's user
sessions terminate without indication of what is wrong (no mention of
Xauthority in any log file).

in comparison, startx gives a debug message about not being able to
write to .Xauthority, and xdm seems to unlink the .Xauthority file.

both behaviors would be viable solutions in my opinion, but the current
form of silent failure is hard to debug; please consider easing that
either way.

thank you
chrysn

-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages lightdm depends on:
ii  adduser                                3.113+nmu3
ii  consolekit                             0.4.6-5
ii  dbus                                   1.8.14-1
ii  debconf [debconf-2.0]                  1.5.55
ii  libc6                                  2.19-13
ii  libgcrypt20                            1.6.2-4+b1
ii  libglib2.0-0                           2.42.1-1
ii  libpam-systemd                         215-10
ii  libpam0g                               1.1.8-3.1
ii  libxcb1                                1.10-3+b1
ii  libxdmcp6                              1:1.1.1-1+b1
ii  lightdm-gtk-greeter [lightdm-greeter]  1.8.5-2

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+7

Versions of packages lightdm suggests:
ii  accountsservice  0.6.37-3+b1
ii  upower           0.99.1-3.1

-- Configuration Files:
/etc/apparmor.d/lightdm-guest-session b51cea1a1248cf9bf45f2e9024c7734f [Errno 
2] No such file or directory: u'/etc/apparmor.d/lightdm-guest-session 
b51cea1a1248cf9bf45f2e9024c7734f'

-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: lightdm

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