Public bug reported:
In Ubuntu 17.10 with GDM 3.26.1-3ubuntu3, the greeter will hang, if
local /home directory is not accessible.
Our setup:
- Ubuntu Server (16.04) with DNS, LDAP, Kerberos 5 and NFS servers. The home
directories are present on the server and made available via NFS with krb5
authentication. LDAP provides the user data for clients.
- Ubuntu client (17.10), bound to the server, uses AutoFS to automount remote
home directories under /home. This makes the otherwise present local user
directories unaccessible.
Expected behaviour: After system startup, the greeter should provide a way for
users to log in.
Actual behaviour: The system hangs before the greeter displays the user list
(but it does display the top menu bar and Ubuntu logo at the bottom).
Additional remarks:
If the settings for local users under /var/lib/AccountsService/users contain
SystemAccount=true, the greeter will work as expected (while not displaying
local users). This is a workaround, that I'm using right now. BUT: if the
network user will log in and invoke the authentication dialog for system-wide
settings (e.g. if he will try to add a new printer, or change the system update
settings), the system will hang before displaying the expected dialog window.
Also if a local user will try to log in by entering his login name and
password, the system will hang (it should either produce an error message, or
log in without a home directory).
AutoFS uses this line to mount the remote home directories under /home:
* -fstype=nfs4,rw,intr,sec=krb5 FQDN:/home/&
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Tags: artful autofs automount gdm3
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https://bugs.launchpad.net/bugs/1728055
Title:
GDM3 hangs, if local home directory is not accessible
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