今天，突然之间，我的主题和图标重置为默认样式。有趣的是，这种情况并不是到处都发生。系统设置中的图标与以前一样；Unity Launchbar 有默认图标。当我启动文件资源管理器 (Nautilus) 时，我的图标是默认图标；当我从终端使用 sudo 启动 Nautilus 时，我选择的图标会重新出现（但仅出现在此窗口中）。
发生了什么？
如果我输入compiz --replace，所有内容都会返回到我的主题/图标集，但 Unity 启动栏没有我的快捷方式。
此外，还会出现以下错误：
compiz (core) - Info: Loading plugin: unityshell
compiz (core) - Info: Starting plugin: unityshell
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.Shell' yet as we don't have a connection, waiting for it...
WARN 2016-01-20 12:13:52 unity.debug.interface DebugDBusInterface.cpp:217 Unable to load entry point in libxpathselect: libxpathselect.so.1.4: cannot open shared object file: No such file or directory -- full D-Bus introspection will not be available
WARN 2016-01-20 12:13:52 xim.controller XIMController.cpp:103 IBus natively supported.
WARN 2016-01-20 12:13:52 unity.dash.gsettingsscopereader GSettingsScopes.cpp:108 Error fetching protocol metadata for scope: social.scope : Valid key file could not be found in search dirs
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Launcher' yet as we don't have a connection, waiting for it...
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Dash' yet as we don't have a connection, waiting for it...
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.SessionManager.EndSessionDialog' yet as we don't have a connection, waiting for it...
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Session' yet as we don't have a connection, waiting for it...
WARN 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.ScreenSaver' yet as we don't have a connection, waiting for it...
ERROR 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:538 DBus name lost 'org.gnome.Shell'
ERROR 2016-01-20 12:13:52 unity.glib.dbus.server GLibDBusServer.cpp:538 DBus name lost 'com.canonical.Unity'
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
WARN 2016-01-20 12:13:52 unity.key.gnome.grabber GnomeKeyGrabber.cpp:99 Trying to grab a disabled action, we skip it
答案1
我解决了它（至少看起来像是一个修复）。
输入后compiz --replace，Unity 桌面的大部分内容都正常了，但有些东西仍然很奇怪，每次启动 Ubuntu 时我都必须输入此命令。
配置似乎有问题，因此桌面再次恢复“正常”后，我首先输入
dconf reset -f /org/compiz/
重置配置，然后
setsid unity
重新启动桌面。我注销，然后重新登录，一切恢复正常，所有图标都正常，主题也正常 - 问题解决了。