[Bug 1779667] Re: Unlocking existing session yields black screen. Closing session does not help as affected user cannot open a successful X session until next reboot. Other users are ok.

## Log: soon Thanks @smcv for your feedback. I believe ubuntu-bug used to automatically attach a number of log files automatically, it appears it did not this time. Bug happens several times a week. I have captured a log. ## Workaround! I wanted to test if running another X session would

[Bug 1779667] Re: Unlocking existing session yields black screen. Closing session does not help as affected user cannot open a successful X session until next reboot. Other users are ok.

Please attach anything vaguely relevant-looking from the system log (systemd Journal if you use systemd, or /var/log/syslog). The bug will probably be somewhere in the vicinity of logind, PAM, dbus-daemon, lightdm, X or XFCE, or possibly graphics drivers in the kernel (which have been known to

[Bug 1779667] Re: Unlocking existing session yields black screen. Closing session does not help as affected user cannot open a successful X session until next reboot. Other users are ok.

Also, the problem is not specific to any user. It randomly affects any of the users of the machine. At that moment only that user is affected. Next time it may affect the same user or another. We believe that it may affect several users at a time, if we keep the machine running until problem