GDM does not start anymore

[Camuzat Sebastien]

Hi everyone !

I do not understand why my GDM does not start anymore
:
"GDM cannot write in your authorization file" is said.
And I cannot log in. When I try to log on another
account, same message.

This has occured after having upgraded from ubuntu to
xubuntu. Context : I was in an XFCE session of my
ubuntu, and made apt-dist upgrade. After reboot,
xubuntu was launched but login impossible.


Any advice ?
Seb


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