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ubuntu 16.04 lightdm: stuck at login loop, but startx works

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

After an accident shutdown, ubuntu stuck at login loop, I can login cli with same user and password by crtl+alt+f1. After several hours struggling, I solved the problem and just want to share it because most posts didn't include my situation.

I tried several solutions including:

1. reset permission and remove .Xauthority,


2. reinstall ubuntu-desktop


3. reconfigure lightdm


4. reinstall nvidia driver


5. check xorg log

but none of them works, after I dig into log files, I found this message in syslog:
(lightdm:3411): CRITICAL **: session_get_login1_session_id: assertion 'session != NULL' failed
and another error in auth.log:
lightdm: PAM unable to dlopen(pam_kwallet.so): /lib/security/pam_kwallet.so: cannot open shared object file: No such file or directory

so I finally figure out that the issue is because of pam-kwallet package broken, and the solution at this link:
cannot login into locked Ubuntu 14.04 session Unity

$ sudo apt-cache search kwallet |grep pam
libpam-kwallet4 - KWallet (KDE 4) integration with PAM
libpam-kwallet5 - KWallet (Kf5) integration with PAM
$ sudo apt-get install libpam-kwallet4 libpam-kwallet5
$ sudo service lightdm restart

Hope it will be helpful.

unity login lightdm authentication

share|improve this question

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It may be helpful - but please separate it into a question + answer in accordance with the Q&A format of the site (you will be able to accept your own answer after a short amount of time)
  
  – steeldriver
  Feb 13 at 18:05
  

  
  
  
  

add a comment | 

0

After an accident shutdown, ubuntu stuck at login loop, I can login cli with same user and password by crtl+alt+f1. After several hours struggling, I solved the problem and just want to share it because most posts didn't include my situation.

I tried several solutions including:

1. reset permission and remove .Xauthority,


2. reinstall ubuntu-desktop


3. reconfigure lightdm


4. reinstall nvidia driver


5. check xorg log

but none of them works, after I dig into log files, I found this message in syslog:
(lightdm:3411): CRITICAL **: session_get_login1_session_id: assertion 'session != NULL' failed
and another error in auth.log:
lightdm: PAM unable to dlopen(pam_kwallet.so): /lib/security/pam_kwallet.so: cannot open shared object file: No such file or directory

so I finally figure out that the issue is because of pam-kwallet package broken, and the solution at this link:
cannot login into locked Ubuntu 14.04 session Unity

$ sudo apt-cache search kwallet |grep pam
libpam-kwallet4 - KWallet (KDE 4) integration with PAM
libpam-kwallet5 - KWallet (Kf5) integration with PAM
$ sudo apt-get install libpam-kwallet4 libpam-kwallet5
$ sudo service lightdm restart

Hope it will be helpful.

unity login lightdm authentication

share|improve this question

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It may be helpful - but please separate it into a question + answer in accordance with the Q&A format of the site (you will be able to accept your own answer after a short amount of time)
  
  – steeldriver
  Feb 13 at 18:05
  

  
  
  
  

add a comment | 

After an accident shutdown, ubuntu stuck at login loop, I can login cli with same user and password by crtl+alt+f1. After several hours struggling, I solved the problem and just want to share it because most posts didn't include my situation.

I tried several solutions including:

1. reset permission and remove .Xauthority,


2. reinstall ubuntu-desktop


3. reconfigure lightdm


4. reinstall nvidia driver


5. check xorg log

but none of them works, after I dig into log files, I found this message in syslog:
(lightdm:3411): CRITICAL **: session_get_login1_session_id: assertion 'session != NULL' failed
and another error in auth.log:
lightdm: PAM unable to dlopen(pam_kwallet.so): /lib/security/pam_kwallet.so: cannot open shared object file: No such file or directory

so I finally figure out that the issue is because of pam-kwallet package broken, and the solution at this link:
cannot login into locked Ubuntu 14.04 session Unity

$ sudo apt-cache search kwallet |grep pam
libpam-kwallet4 - KWallet (KDE 4) integration with PAM
libpam-kwallet5 - KWallet (Kf5) integration with PAM
$ sudo apt-get install libpam-kwallet4 libpam-kwallet5
$ sudo service lightdm restart

Hope it will be helpful.

unity login lightdm authentication

share|improve this question

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

$ sudo apt-cache search kwallet |grep pam
libpam-kwallet4 - KWallet (KDE 4) integration with PAM
libpam-kwallet5 - KWallet (Kf5) integration with PAM
$ sudo apt-get install libpam-kwallet4 libpam-kwallet5
$ sudo service lightdm restart

share|improve this question

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

share|improve this question

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

asked Feb 13 at 17:48

Alex ChenAlex Chen

1

asked Feb 13 at 17:48

Alex ChenAlex Chen

1