LDM uses `ssh user@server` to authenticate users. It then copies the user /etc/passwd information from the server to the client, but it doesn't copy the /etc/shadow part, i.e. the user password hash.
So fat client and localapps users do not have a password set, and thus cannot use `sudo`, cannot unlock a screensaver etc. The fix would be to let LDM/ssh.c write the hash of the password it gets from the user, locally to /etc/passwd. Patches welcome for that. In the future, for LTSP 6, the plan is to drop LDM completely and use pam to authenticate users, so there won't be issues like that there. But without contributors, LTSP 6 might take a long while to arrive... :) -- You received this bug notification because you are a member of DX Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1316320 Title: Screen Lock does not prompt for password Status in Linux Terminal Server Project: New Status in Unity: Invalid Status in “unity” package in Ubuntu: Invalid Bug description: I am using LTSP fat clients, created with: $ sudo ltsp-build-image --arch amd64 --fat-client-desktop ubuntu- desktop LTSP server has sssd authentication utilizing pam and ldap. Users can log in without issue and the home folder is available. Everything works as expected except for screen locking. When locking the screen, the displays first go blank and the monitor goes to sleep. Then if i move the mouse or press a keystroke, They go black but the mouse is visible. Once I move the mouse or strike a key the second time, everything comes back up without password prompt. However, password prompt is enabled in "Brightness & Lock" The client hardware is an Intel NUC D34010WYK Also maybe related, there seems to be no system tray. No clock or username/logout buttons. I am using Ctrl + Alt + L to lock the screen. (See attached screenshot) This is a security vulnerability and I can not make the new 14.04 image available as fat clients, since they users cannot lock their workstation. To manage notifications about this bug go to: https://bugs.launchpad.net/ltsp/+bug/1316320/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp
