Public bug reported:
solution tried:
sudo apt-get install --reinstall xserver-xorg lightdm
sudo dpkg-reconfigure xserver-xorg lightdm
sudo Xorg -reconfigure
finally i checked log file /var/log/lightdm/lightdm.log
it shows that lightdm cannot open /var/lib/lightdm/.Xauthority
my solution:
mkdir /var/lib/lightdm
chown lightdm:lightdm /var/lib/lightdm
and it works
so, why reinstalling lightdm can't create /var/lib/lightdm
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1585046
Title:
failsafe x: low graphics mode
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