Tue Jul 25, 2017 2:20 am
Everything was just frozen, couldn't even change tty's. Had to reboot using physical power button.
I run aptitude upgrade daily, & haven't had to reboot for weeks, if not months previously. Yesterday I did reboot, & everything came back up as per usual, then today this.
The clock was at 01:09:xx, so I know what time it kicked the bucket. Which log(s), if any, can I look at to see what happened?
Tue Jul 25, 2017 7:11 pm
And then overnight the screen turned black with barely visible windows scattered across the borders with just their corners in the viewing range of the screen. In this case mouse & tty's worked & I was able to reboot from there.
Tue Jul 25, 2017 8:41 pm
Two possible causes:
(Automatic ?) update of 'X Window System' coming
in from Ubuntu, while running 'X'. They updated this, lately.
But that's improbable.
Maybe, a new cron-job running at 1 o'clock?
À propos Your wrong reolution:
changed DRM config? (Direct Rendering Management)
Wrong/changed file permissions?
More details needed:
journalctl -b <bootnumber of freeze>
Last Entries written there.