我最近将工作站从 Debian 9 升级到 Debian 10。使用旧版本，人们可以安装 USB 驱动器并播放和录制声音（用于视频会议）。更新后这两个都不起作用。
远程用户帐户
用户帐户存在一些特殊性，因此这可能是问题的根源。我们使用 NIS 和 NFS 在所有计算机上提供用户帐户和主目录。升级到 Debian 10 后，我需要添加一个NISto，/etc/nsswitch.conf因为它们compat之前是打开的，现在只有files.也ypbind没有运行，因为它不再用作
-broadcast默认启动选项。我在以下位置添加了一个新的 systemd 文件
/etc/systemd/system/ypbind.service：
[Unit]
Description=ypbind
Wants=network-online.target nis.service
After=network-online.target nis.service
[Service]
Type=simple
ExecStart=/usr/sbin/ypbind -broadcast -foreground
[Install]
WantedBy=multi-user.target
这样，用户帐户和主目录就在那里。在命令行上我也可以登录。但是 LightDM 显示管理器仍然不允许用户登录。所以在/etc/lightdm/lightdm.conf本节中[LightDM]
我添加了该选项greeter-show-manual-login = True，从那时起远程用户就可以登录了。有些机器仍然将 GDM 作为默认设置显示管理器，登录显示的行为与我更改配置之前 LightDM 的行为相同。密码检查通过，屏幕可能会短暂变黑，然后再次显示登录屏幕。当用户超出配额并且.Xauthority无法创建建立会话 (?) 所需的文件时，也会发生同样的情况。
奇怪的是，当我通过 SSH 登录并在实际屏幕上登录时，这些会话会正确显示who：
$ who
ueding pts/0 2019-08-26 12:42 (131.220.226.20)
ueding tty7 2019-08-26 12:43 (:0)
但同时该会话未列出loginctl：
$ loginctl
No sessions.
当我使用本地用户帐户在我的个人 Fedora 30 笔记本电脑上执行相同操作时，我会得到以下输出who：
$ who
mu tty1 2019-08-25 10:33 (:0)
mu pts/0 2019-08-25 10:34 (:0)
mu pts/1 2019-08-26 12:08 (:0)
mu pts/2 2019-08-26 12:14 (:0)
mu pts/3 2019-08-26 12:42 (:0)
mu pts/4 2019-08-26 12:38 (:0)
mu pts/5 2019-08-26 12:55 (:0)
并且还loginctl显示了一些明智的内容：
$ loginctl
SESSION UID USER SEAT TTY
1 1000 mu seat0
1 sessions listed.
我创建了一个新的当地的在 Debian 10 工作站之一上使用 UID 50000 的用户帐户，发现我可以登录，会话显示出来loginctl，而且下面描述的可移动媒体和声音问题也不存在，声音和可移动媒体正常。所以这确实是来自 NIS 的用户的问题。
到目前为止，让我印象深刻的一件事是，由于历史原因，我们给出的用户 id 以 500 开头。但我的用户的uedinguid 为 1085，所以即使这是帐户未列出的问题，这account 应该没问题，因为不被视为系统用户的用户 ID 的默认起始值为 1000。
我没有足够的经验，但我有感觉不知何故，用户帐户并不完全在系统中，只是还缺少一些东西。
一名 uid 为 536 的用户在登录后必须输入他的 GNOME 钥匙串密码。我不确定他是否有不同的密码，但也可能是在启动过程中未解锁。不过，这可能没有任何意义。
验证日志
/var/log/auth.log在当前状态下，这是自启动计算机、通过 SSH 以 root 身份连接以检索日志并使用我的 NIS 用户登录计算机本身以来显示的所有内容。用户还monitoring通过 SSH 登录来检索我的监控系统的一些信息。
Sep 3 12:45:42 helios systemd-logind[497]: New seat seat0.
Sep 3 12:45:42 helios systemd-logind[497]: Watching system buttons on /dev/input/event1 (Power Button)
Sep 3 12:45:42 helios systemd-logind[497]: Watching system buttons on /dev/input/event0 (Power Button)
Sep 3 12:45:42 helios systemd-logind[497]: Watching system buttons on /dev/input/event3 (Cherry USB keyboard)
Sep 3 12:45:42 helios systemd-logind[497]: Watching system buttons on /dev/input/event4 (Cherry USB keyboard System Control)
Sep 3 12:45:46 helios sshd[650]: Server listening on 0.0.0.0 port 22.
Sep 3 12:45:46 helios sshd[650]: Server listening on :: port 22.
Sep 3 12:45:57 helios lightdm: pam_unix(lightdm-greeter:session): session opened for user lightdm by (uid=0)
Sep 3 12:45:57 helios systemd-logind[497]: New session c1 of user lightdm.
Sep 3 12:45:57 helios systemd: pam_unix(systemd-user:session): session opened for user lightdm by (uid=0)
Sep 3 12:47:08 helios sshd[1339]: rexec line 16: Deprecated option UsePrivilegeSeparation
Sep 3 12:47:08 helios sshd[1339]: rexec line 19: Deprecated option KeyRegenerationInterval
Sep 3 12:47:08 helios sshd[1339]: rexec line 20: Deprecated option ServerKeyBits
Sep 3 12:47:08 helios sshd[1339]: rexec line 31: Deprecated option RSAAuthentication
Sep 3 12:47:08 helios sshd[1339]: rexec line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:08 helios sshd[1339]: Connection closed by 131.220.226.3 port 39932 [preauth]
Sep 3 12:47:16 helios sshd[1341]: rexec line 16: Deprecated option UsePrivilegeSeparation
Sep 3 12:47:16 helios sshd[1341]: rexec line 19: Deprecated option KeyRegenerationInterval
Sep 3 12:47:16 helios sshd[1341]: rexec line 20: Deprecated option ServerKeyBits
Sep 3 12:47:16 helios sshd[1341]: rexec line 31: Deprecated option RSAAuthentication
Sep 3 12:47:16 helios sshd[1341]: rexec line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:16 helios sshd[1341]: reprocess config line 31: Deprecated option RSAAuthentication
Sep 3 12:47:16 helios sshd[1341]: reprocess config line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:19 helios sshd[1341]: Accepted password for root from 131.220.226.160 port 44060 ssh2
Sep 3 12:47:19 helios sshd[1341]: pam_unix(sshd:session): session opened for user root by (uid=0)
Sep 3 12:47:19 helios systemd-logind[497]: New session 2 of user root.
Sep 3 12:47:19 helios systemd: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Sep 3 12:47:20 helios sshd[1367]: rexec line 16: Deprecated option UsePrivilegeSeparation
Sep 3 12:47:20 helios sshd[1367]: rexec line 19: Deprecated option KeyRegenerationInterval
Sep 3 12:47:20 helios sshd[1367]: rexec line 20: Deprecated option ServerKeyBits
Sep 3 12:47:20 helios sshd[1367]: rexec line 31: Deprecated option RSAAuthentication
Sep 3 12:47:20 helios sshd[1367]: rexec line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:20 helios sshd[1367]: reprocess config line 31: Deprecated option RSAAuthentication
Sep 3 12:47:20 helios sshd[1367]: reprocess config line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:20 helios sshd[1367]: Accepted publickey for monitoring from 131.220.226.3 port 39970 ssh2: RSA SHA256:ulxULyONiGRB8VUFctWd/WSBcRxjGX+5Dq/IXyZS+gI
Sep 3 12:47:20 helios sshd[1367]: pam_unix(sshd:session): session opened for user monitoring by (uid=0)
Sep 3 12:47:20 helios systemd-logind[497]: New session 4 of user monitoring.
Sep 3 12:47:20 helios systemd: pam_unix(systemd-user:session): session opened for user monitoring by (uid=0)
Sep 3 12:47:20 helios sshd[1385]: Received disconnect from 131.220.226.3 port 39970:11: disconnected by user
Sep 3 12:47:20 helios sshd[1385]: Disconnected from user monitoring 131.220.226.3 port 39970
Sep 3 12:47:20 helios sshd[1367]: pam_unix(sshd:session): session closed for user monitoring
Sep 3 12:47:20 helios systemd-logind[497]: Session 4 logged out. Waiting for processes to exit.
Sep 3 12:47:20 helios systemd-logind[497]: Removed session 4.
Sep 3 12:47:30 helios systemd: pam_unix(systemd-user:session): session closed for user monitoring
Sep 3 12:47:32 helios sshd[1398]: rexec line 16: Deprecated option UsePrivilegeSeparation
Sep 3 12:47:32 helios sshd[1398]: rexec line 19: Deprecated option KeyRegenerationInterval
Sep 3 12:47:32 helios sshd[1398]: rexec line 20: Deprecated option ServerKeyBits
Sep 3 12:47:32 helios sshd[1398]: rexec line 31: Deprecated option RSAAuthentication
Sep 3 12:47:32 helios sshd[1398]: rexec line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:32 helios sshd[1398]: reprocess config line 31: Deprecated option RSAAuthentication
Sep 3 12:47:32 helios sshd[1398]: reprocess config line 38: Deprecated option RhostsRSAAuthentication
Sep 3 12:47:32 helios sshd[1398]: Accepted publickey for monitoring from 131.220.226.3 port 39992 ssh2: RSA SHA256:ulxULyONiGRB8VUFctWd/WSBcRxjGX+5Dq/IXyZS+gI
Sep 3 12:47:32 helios sshd[1398]: pam_unix(sshd:session): session opened for user monitoring by (uid=0)
Sep 3 12:47:32 helios systemd-logind[497]: New session 6 of user monitoring.
Sep 3 12:47:32 helios systemd: pam_unix(systemd-user:session): session opened for user monitoring by (uid=0)
Sep 3 12:47:32 helios sshd[1416]: Received disconnect from 131.220.226.3 port 39992:11: disconnected by user
Sep 3 12:47:32 helios sshd[1416]: Disconnected from user monitoring 131.220.226.3 port 39992
Sep 3 12:47:32 helios sshd[1398]: pam_unix(sshd:session): session closed for user monitoring
Sep 3 12:47:32 helios systemd-logind[497]: Session 6 logged out. Waiting for processes to exit.
Sep 3 12:47:32 helios systemd-logind[497]: Removed session 6.
Sep 3 12:47:42 helios systemd: pam_unix(systemd-user:session): session closed for user monitoring
Sep 3 12:48:14 helios lightdm: pam_unix(lightdm-greeter:session): session closed for user lightdm
Sep 3 12:48:14 helios systemd-logind[497]: Removed session c1.
Sep 3 12:48:14 helios lightdm: pam_unix(lightdm:session): session opened for user ueding by (uid=0)
Sep 3 12:48:14 helios lightdm: pam_systemd(lightdm:session): Failed to create session: No such file or directory
Sep 3 12:48:24 helios systemd: pam_unix(systemd-user:session): session closed for user lightdm
我想倒数第二行是非常有趣的一行。
随附的系统日志
Sep 04 14:10:10 helios systemd[1]: session-c3.scope: Killing process 28814 (lightdm) with signal SIGTERM.
Sep 04 14:10:10 helios systemd[1]: session-c3.scope: Killing process 28829 (lightdm-gtk-gre) with signal SIGTERM.
Sep 04 14:10:10 helios systemd[1]: Stopping Session c3 of user lightdm.
Sep 04 14:10:10 helios lightdm[28814]: pam_unix(lightdm-greeter:session): session closed for user lightdm
Sep 04 14:10:10 helios systemd[1]: session-c3.scope: Succeeded.
Sep 04 14:10:10 helios systemd[1]: Stopped Session c3 of user lightdm.
Sep 04 14:10:10 helios systemd-logind[497]: Removed session c3.
Sep 04 14:10:10 helios lightdm[28869]: pam_unix(lightdm:session): session opened for user ueding by (uid=0)
Sep 04 14:10:10 helios lightdm[28869]: pam_systemd(lightdm:session): Failed to create session: No such file or directory
Sep 04 14:10:10 helios lightdm[28869]: Failed to open CK session: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.ConsoleKit was not provided by any .service files
Sep 04 14:10:10 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.a11y.Bus' requested by ':1.3' (uid=1085 pid=28933 comm="xfce4-session ")
Sep 04 14:10:10 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.a11y.Bus'
Sep 04 14:10:10 helios org.a11y.Bus[28914]: dbus-daemon[28940]: Activating service name='org.a11y.atspi.Registry' requested by ':1.0' (uid=1085 pid=28933 comm="xfce4-session ")
Sep 04 14:10:10 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.xfce.Xfconf' requested by ':1.3' (uid=1085 pid=28933 comm="xfce4-session ")
Sep 04 14:10:10 helios org.a11y.Bus[28914]: dbus-daemon[28940]: Successfully activated service 'org.a11y.atspi.Registry'
Sep 04 14:10:10 helios org.a11y.Bus[28914]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Sep 04 14:10:10 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.xfce.Xfconf'
Sep 04 14:10:11 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.Daemon' requested by ':1.9' (uid=1085 pid=28954 comm="Thunar --sm-client-id 2e9ea3a26-363a-4e06-b723-b6d")
Sep 04 14:10:11 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.Daemon'
Sep 04 14:10:11 helios org.gtk.vfs.Daemon[28914]: fusermount: failed to open mountpoint for reading: Permission denied
Sep 04 14:10:11 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.freedesktop.thumbnails.Thumbnailer1' requested by ':1.16' (uid=1085 pid=28972 comm="xfdesktop --display :0.0 --sm-client-id 24fe00ba0-")
Sep 04 14:10:11 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.freedesktop.Notifications' requested by ':1.20' (uid=1085 pid=28988 comm="xfce4-power-manager --restart --sm-client-id 270b9")
Sep 04 14:10:11 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.freedesktop.Notifications'
Sep 04 14:10:12 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.freedesktop.Tracker1' requested by ':1.28' (uid=1085 pid=29060 comm="gdbus call -e -d org.freedesktop.DBus -o /org/free")
Sep 04 14:10:12 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='ca.desrt.dconf' requested by ':1.29' (uid=1085 pid=29045 comm="light-locker ")
Sep 04 14:10:12 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'ca.desrt.dconf'
Sep 04 14:10:12 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.freedesktop.Tracker1'
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer /usr/bin/gdk-pixbuf-thumbnailer -s %s %u %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer evince-thumbnailer -s %s %u %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer gnome-thumbnail-font --size %s %u %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer /usr/bin/gdk-pixbuf-thumbnailer -s %s %u %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer atril-thumbnailer -s %s %u %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer /usr/share/blender/scripts/blender-thumbnailer.py %i %o
Sep 04 14:10:12 helios org.freedesktop.thumbnails.Thumbnailer1[28914]: Registered thumbailer /usr/bin/totem-video-thumbnailer -s %s %u %o
Sep 04 14:10:12 helios kernel: traps: light-locker[29045] trap int3 ip:7f6a78690c75 sp:7ffec8e2fea0 error:0 in libglib-2.0.so.0.5800.3[7f6a78658000+7e000]
Sep 04 14:10:12 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gnome.evolution.dataserver.Sources5' requested by ':1.38' (uid=1085 pid=29044 comm="/usr/lib/evolution/evolution-data-server/evolution")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gnome.OnlineAccounts' requested by ':1.40' (uid=1085 pid=29094 comm="/usr/lib/evolution/evolution-source-registry ")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gnome.evolution.dataserver.Sources5'
Sep 04 14:10:13 helios goa-daemon[29107]: goa-daemon version 3.30.1 starting
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gnome.Identity' requested by ':1.41' (uid=1085 pid=29107 comm="/usr/lib/gnome-online-accounts/goa-daemon ")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gnome.OnlineAccounts'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gnome.Identity'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gnome.evolution.dataserver.Calendar7' requested by ':1.38' (uid=1085 pid=29044 comm="/usr/lib/evolution/evolution-data-server/evolution")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.UDisks2VolumeMonitor' requested by ':1.23' (uid=1085 pid=28986 comm="/usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd ")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.UDisks2VolumeMonitor'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.AfcVolumeMonitor' requested by ':1.23' (uid=1085 pid=28986 comm="/usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd ")
Sep 04 14:10:13 helios org.gtk.vfs.AfcVolumeMonitor[28914]: Volume monitor alive
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.AfcVolumeMonitor'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gnome.evolution.dataserver.Calendar7'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gnome.evolution.dataserver.AddressBook9' requested by ':1.43' (uid=1085 pid=29125 comm="/usr/lib/evolution/evolution-calendar-factory ")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.GoaVolumeMonitor' requested by ':1.23' (uid=1085 pid=28986 comm="/usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd ")
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gnome.evolution.dataserver.AddressBook9'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.GoaVolumeMonitor'
Sep 04 14:10:13 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.MTPVolumeMonitor' requested by ':1.23' (uid=1085 pid=28986 comm="/usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd ")
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.MTPVolumeMonitor'
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.GPhoto2VolumeMonitor' requested by ':1.23' (uid=1085 pid=28986 comm="/usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd ")
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.GPhoto2VolumeMonitor'
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.freedesktop.thumbnails.Thumbnailer1'
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Activating service name='org.gtk.vfs.Metadata' requested by ':1.14' (uid=1085 pid=28972 comm="xfdesktop --display :0.0 --sm-client-id 24fe00ba0-")
Sep 04 14:10:14 helios dbus-daemon[28914]: [session uid=1085 pid=28912] Successfully activated service 'org.gtk.vfs.Metadata'
Sep 04 14:10:20 helios systemd[1]: Stopping User Manager for UID 116...
Sep 04 14:10:20 helios systemd[28818]: Stopping D-Bus User Message Bus...
Sep 04 14:10:20 helios gvfsd[28842]: A connection to the bus can't be made
Sep 04 14:10:20 helios systemd[28818]: Stopping Accessibility services bus...
Sep 04 14:10:20 helios systemd[28818]: Stopping Virtual filesystem service...
Sep 04 14:10:20 helios systemd[28818]: Stopped target Default.
Sep 04 14:10:20 helios systemd[28818]: gvfs-daemon.service: Main process exited, code=killed, status=15/TERM
Sep 04 14:10:20 helios systemd[28818]: at-spi-dbus-bus.service: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Stopped Accessibility services bus.
Sep 04 14:10:20 helios systemd[28818]: dbus.service: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Stopped D-Bus User Message Bus.
Sep 04 14:10:20 helios systemd[1]: run-user-116-gvfs.mount: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: run-user-116-gvfs.mount: Succeeded.
Sep 04 14:10:20 helios systemd[25779]: run-user-116-gvfs.mount: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: gvfs-daemon.service: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Stopped Virtual filesystem service.
Sep 04 14:10:20 helios systemd[28818]: Stopped target Basic System.
Sep 04 14:10:20 helios systemd[28818]: Stopped target Sockets.
Sep 04 14:10:20 helios systemd[28818]: gpg-agent-browser.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed GnuPG cryptographic agent and passphrase cache (access for web browsers).
Sep 04 14:10:20 helios systemd[28818]: gpg-agent.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed GnuPG cryptographic agent and passphrase cache.
Sep 04 14:10:20 helios systemd[28818]: gpg-agent-ssh.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed GnuPG cryptographic agent (ssh-agent emulation).
Sep 04 14:10:20 helios systemd[28818]: dirmngr.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed GnuPG network certificate management daemon.
Sep 04 14:10:20 helios systemd[28818]: gpg-agent-extra.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed GnuPG cryptographic agent and passphrase cache (restricted).
Sep 04 14:10:20 helios systemd[28818]: pulseaudio.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed Sound System.
Sep 04 14:10:20 helios systemd[28818]: Stopped target Timers.
Sep 04 14:10:20 helios systemd[28818]: Stopped target Paths.
Sep 04 14:10:20 helios systemd[28818]: dbus.socket: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Closed D-Bus User Message Bus Socket.
Sep 04 14:10:20 helios systemd[28818]: Reached target Shutdown.
Sep 04 14:10:20 helios systemd[28818]: systemd-exit.service: Succeeded.
Sep 04 14:10:20 helios systemd[28818]: Started Exit the Session.
Sep 04 14:10:20 helios systemd[28818]: Reached target Exit the Session.
Sep 04 14:10:20 helios systemd[28819]: pam_unix(systemd-user:session): session closed for user lightdm
Sep 04 14:10:20 helios systemd[1]: [email protected]: Succeeded.
Sep 04 14:10:20 helios systemd[1]: Stopped User Manager for UID 116.
Sep 04 14:10:20 helios systemd[1]: Stopping User Runtime Directory /run/user/116...
Sep 04 14:10:20 helios systemd[25779]: run-user-116.mount: Succeeded.
Sep 04 14:10:20 helios systemd[1]: run-user-116.mount: Succeeded.
Sep 04 14:10:20 helios systemd[1]: [email protected]: Succeeded.
Sep 04 14:10:20 helios systemd[1]: Stopped User Runtime Directory /run/user/116.
Sep 04 14:10:20 helios systemd[1]: Removed slice User Slice of UID 116.
目前的结论
我觉得有一些东西阻止用户“完全登录”，从某种意义上说，他们确实有一个 Xfce 会话并且可以看到他们的主目录，但不足以注册诸如
logindPulse Audio 之类的“花哨”东西。或者也许他们缺少一个特殊的用户群体。计算机上的本地用户帐户按预期工作，因此这肯定是一般用户帐户的问题，而不是症状之一（loginctl输出、声音、可移动媒体）。
我无法真正理解这一点，我不确定我到底应该看哪里。非常欢迎指针或（希望）解决方案！
答案1
我遇到了同样的问题，最终发现了这个： https://github.com/systemd/systemd/issues/7074
我尝试了各种技巧，但最终为我解决的方法很简单：
sudo apt-get install nscd
这是“apt-cache show nscd”的内容：
Description-en: GNU C 库：名称服务缓存守护进程 一个守护进程，用于处理正在运行的程序的密码、组和主机查找，并缓存下一个查询的结果。仅当您使用 LDAP、NIS 或 NIS+ 等慢速服务时才应安装此软件包。