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[Chris Fox <1228570@xxxxxxxxxxxxxxxxxx>]

I've got the same problem in Ubuntu 13.04. After login, I get a blank
screen for about a second, then it goes back to lightdm. Removing either
.ICEauthority or .Xauthority solves the problem. The problem reappears
(to me) seemingly random, so not necessarily after each successful
login.

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https://bugs.launchpad.net/bugs/1228570

Title:
  Login often fails

Status in “lightdm” package in Ubuntu:
  Confirmed
Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  I am using the Lenovo Thinkpad Twist with Saucy and the standard Unity
  desktop. Often when I log in, after entering the password the screen
  gets black and within one second I am back in LightDM. I have to enter
  my password three or four times until getting a successful login.
  Logging in right after reboot works more often. Logging into the guest
  account always works.

  There are no messages in .xsession-errors. /var/log/syslog adds the
  following lines after pressing Enter after entering the password until
  LightDM re-appearing:

  First failed attempt:

  Sep 21 13:28:05 till-twist colord: device removed: xrandr-LVDS1
  Sep 21 13:28:05 till-twist colord: Profile removed: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:28:05 till-twist colord: Profile removed: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:28:05 till-twist colord: Profile removed: icc-42cf0f25cbd914f2177438317b72f222
  Sep 21 13:28:05 till-twist NetworkManager[1705]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.139': no such name
  Sep 21 13:28:05 till-twist acpid: client 7242[0:0] has disconnected
  Sep 21 13:28:05 till-twist acpid: client connected from 7493[0:0]
  Sep 21 13:28:05 till-twist acpid: 1 client rule loaded
  Sep 21 13:28:05 till-twist dbus[574]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  Sep 21 13:28:05 till-twist dbus[574]: [system] Successfully activated service 'org.freedesktop.systemd1'
  Sep 21 13:28:06 till-twist colord: Device added: xrandr-LVDS1
  Sep 21 13:28:06 till-twist colord: Profile added: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:28:06 till-twist colord: Automatic metadata add icc-f5a7781aa544aba4d0654c67690ec8d4 to xrandr-LVDS1
  Sep 21 13:28:06 till-twist colord: Profile added: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:28:06 till-twist colord: Profile added: icc-42cf0f25cbd914f2177438317b72f222

  Second failed attempt:

  Sep 21 13:34:42 till-twist colord: device removed: xrandr-LVDS1
  Sep 21 13:34:42 till-twist colord: Profile removed: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:34:42 till-twist colord: Profile removed: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:34:42 till-twist colord: Profile removed: icc-42cf0f25cbd914f2177438317b72f222
  Sep 21 13:34:42 till-twist NetworkManager[1705]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.protected: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.160': no such name
  Sep 21 13:34:42 till-twist NetworkManager[1705]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.160': no such name
  Sep 21 13:34:43 till-twist acpid: client 7493[0:0] has disconnected
  Sep 21 13:34:43 till-twist acpid: client connected from 7737[0:0]
  Sep 21 13:34:43 till-twist acpid: 1 client rule loaded
  Sep 21 13:34:43 till-twist dbus[574]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  Sep 21 13:34:43 till-twist dbus[574]: [system] Successfully activated service 'org.freedesktop.systemd1'
  Sep 21 13:34:43 till-twist colord: Device added: xrandr-LVDS1
  Sep 21 13:34:43 till-twist colord: Profile added: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:34:43 till-twist colord: Automatic metadata add icc-f5a7781aa544aba4d0654c67690ec8d4 to xrandr-LVDS1
  Sep 21 13:34:43 till-twist colord: Profile added: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:34:43 till-twist colord: Profile added: icc-42cf0f25cbd914f2177438317b72f222

  Third failed attempt:

  Sep 21 13:34:53 till-twist whoopsie[1969]: online
  Sep 21 13:35:43 till-twist colord: device removed: xrandr-LVDS1
  Sep 21 13:35:43 till-twist colord: Profile removed: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:35:43 till-twist colord: Profile removed: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:35:43 till-twist colord: Profile removed: icc-42cf0f25cbd914f2177438317b72f222
  Sep 21 13:35:43 till-twist NetworkManager[1705]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.protected: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.175': no such name
  Sep 21 13:35:43 till-twist NetworkManager[1705]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.175': no such name
  Sep 21 13:35:44 till-twist acpid: client 7737[0:0] has disconnected
  Sep 21 13:35:44 till-twist acpid: client connected from 7948[0:0]
  Sep 21 13:35:44 till-twist acpid: 1 client rule loaded
  Sep 21 13:35:45 till-twist dbus[574]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  Sep 21 13:35:45 till-twist dbus[574]: [system] Successfully activated service 'org.freedesktop.systemd1'
  Sep 21 13:35:45 till-twist colord: Device added: xrandr-LVDS1
  Sep 21 13:35:45 till-twist colord: Profile added: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:35:45 till-twist colord: Automatic metadata add icc-f5a7781aa544aba4d0654c67690ec8d4 to xrandr-LVDS1
  Sep 21 13:35:45 till-twist colord: Profile added: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:35:45 till-twist colord: Profile added: icc-42cf0f25cbd914f2177438317b72f222

  And this gets added to /var/log/syslog when the login succeeds
  starting from after pressing Enter after entering the password until
  the desktop being ready to use:

  Sep 21 13:37:45 till-twist colord: device removed: xrandr-LVDS1
  Sep 21 13:37:45 till-twist colord: Profile removed: icc-212ca362d5002958378e8fefb0ad7943
  Sep 21 13:37:45 till-twist colord: Profile removed: icc-f5a7781aa544aba4d0654c67690ec8d4
  Sep 21 13:37:45 till-twist colord: Profile removed: icc-42cf0f25cbd914f2177438317b72f222
  Sep 21 13:37:45 till-twist dbus[738]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
  Sep 21 13:37:45 till-twist dbus[738]: [system] Successfully activated service 'org.freedesktop.systemd1'
  Sep 21 13:37:46 till-twist colord: Device added: xrandr-LVDS1
  Sep 21 13:37:46 till-twist gnome-session[3222]: Gtk-WARNING: Theme parsing error: gtk-widgets.css:1605:38: '' is not a valid color name
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Successfully made thread 3409 of process 3409 (n/a) owned by '1000' high priority at nice level -11.
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Supervising 4 threads of 2 processes of 2 users.
  Sep 21 13:37:46 till-twist gnome-session[3222]: Gtk-WARNING: Theme parsing error: gtk-widgets.css:1605:38: '' is not a valid color name
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Successfully made thread 3448 of process 3409 (n/a) owned by '1000' RT at priority 5.
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Supervising 5 threads of 2 processes of 2 users.
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Successfully made thread 3453 of process 3409 (n/a) owned by '1000' RT at priority 5.
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Supervising 6 threads of 2 processes of 2 users.
  Sep 21 13:37:46 till-twist bluetoothd[905]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/HFPAG
  Sep 21 13:37:46 till-twist bluetoothd[905]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/HFPHS
  Sep 21 13:37:46 till-twist bluetoothd[905]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSource
  Sep 21 13:37:46 till-twist bluetoothd[905]: Endpoint registered: sender=:1.66 path=/MediaEndpoint/A2DPSink
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Successfully made thread 3472 of process 3472 (n/a) owned by '1000' high priority at nice level -11.
  Sep 21 13:37:46 till-twist rtkit-daemon[2457]: Supervising 7 threads of 3 processes of 2 users.
  Sep 21 13:37:46 till-twist pulseaudio[3472]: [pulseaudio] pid.c: Daemon already running.
  Sep 21 13:37:46 till-twist dbus[738]: [system] Activating service name='org.freedesktop.locale1' (using servicehelper)
  Sep 21 13:37:46 till-twist dbus[738]: [system] Successfully activated service 'org.freedesktop.locale1'
  Sep 21 13:37:46 till-twist colord: Profile added: icc-75d60d950fd529eb4eb5d13774694db0
  Sep 21 13:37:46 till-twist colord: Profile added: icc-0c800749ecb3e100c49f4d0032efb574
  Sep 21 13:37:46 till-twist colord: Automatic metadata add icc-ddef9b1134614d611689ddc660185c5e to xrandr-LVDS1
  Sep 21 13:37:46 till-twist colord: Profile added: icc-ddef9b1134614d611689ddc660185c5e
  Sep 21 13:37:46 till-twist dbus[738]: [system] Activating service name='org.freedesktop.UDisks2' (using servicehelper)
  Sep 21 13:37:46 till-twist udisksd[3607]: udisks daemon version 2.1.0 starting
  Sep 21 13:37:46 till-twist dbus[738]: [system] Successfully activated service 'org.freedesktop.UDisks2'
  Sep 21 13:37:46 till-twist udisksd[3607]: Acquired the name org.freedesktop.UDisks2 on the system message bus

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