Public bug reported:
Symptoms:
- I cannot login to the graphical session neither using lightdm not lxdm
- After typing password and hitting enter the login screen disappears and
reappears after 4-5 seconds
- Login as guest does not work as well
- Worked before, I am not aware of having done anything special
- Login on console works
- Tried several hints, like those from
http://askubuntu.com/questions/223501/ubuntu-gets-stuck-in-a-login-loop,
http://askubuntu.com/questions/590561/ubuntu-14-04-login-loop-problem
- not a permission problem with .Xauthority, .ICEauthority, /tmp
- not a graphics driver issue
- sudo pam-auth-update --force did not help
According to lightdm.log, authentication succeeds and it stops greeter and
starts gnome-session, which seems to fail with:
CRITICAL: session_get_login1_session_id: assertion 'session != NULL' failed
in ~/.xsession-errors I get:
openConnection: connect: Datei oder Verzeichnis nicht gefunden
cannot connect to brltty at :0
upstart: gnome-session (GNOME)-main-Prozess (2158) wurde mit dem Status 1
beendet
upstart: logrotate-main-Prozess (2023) wurde von TERM-Signal beendet
upstart: bamfdaemon-main-Prozess (2080) wurde von TERM-Signal beendet
upstart: Vom benachrichtigten D-Bus-Bus getrennt
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "lightdm.log"
https://bugs.launchpad.net/bugs/1636718/+attachment/4767384/+files/lightdm.log
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https://bugs.launchpad.net/bugs/1636718
Title:
Grapical login fails (independent from Display Manager)
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