我的两台机器都出现了同样的问题。这是最近才开始出现的——大约在最近几周，更新频率很高，甚至每天都有更新。
18.04 的机器运行良好。
任何日志中都没有错误。
评论中要求：
$ dpkg -l | grep ^ii | grep screensaver
ii libopengl-xscreensaver-perl 0.05-1build4 amd64 Perl module for writing OpenGL-based XScreenSaver hacks
ii mate-screensaver-common 1.20.2-1 all MATE screen saver and locker (common files)
ii xscreensaver 5.36-1ubuntu1 amd64 Screensaver daemon and frontend for X11
ii xscreensaver-data 5.36-1ubuntu1 amd64 Screen saver modules for screensaver frontends
ii xscreensaver-data-extra 5.36-1ubuntu1 amd64 Extra screen saver modules for screensaver frontends
ii xscreensaver-gl 5.36-1ubuntu1 amd64 GL(Mesa) screen saver modules for screensaver frontends
ii xscreensaver-gl-extra 5.36-1ubuntu1 amd64 Extra GL(Mesa) screen saver modules for screensaver frontends
ii xscreensaver-screensaver-bsod 5.36-1ubuntu1 amd64 BSOD screen saver module from XScreenSaver
ii xscreensaver-screensaver-dizzy 0.3-3 all Graphics demo that makes you dizzy (XScreenSaver hack)
ii xscreensaver-screensaver-webcollage 5.36-1ubuntu1 amd64 Webcollage screen saver module from XScreenSaver
删除 mate-screensaver 后更新
在一台 18.10 机器上，xscreensaver 正在运行。在某个时候，由于我忘记的原因，我创建了一个启动桌面文件和服务文件所以我删除了启动。
在另一台 18.10 机器上它不起作用。
现在的情况：
$ dpkg -l | grep ^ii | grep screensaver | grep -v xscreen
$
$ systemctl --user status xscreensaver
● xscreensaver.service - XScreenSaver
Loaded: loaded (/home/stephen/.config/systemd/user/xscreensaver.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2019-02-03 18:00:25 PST; 14h ago
Main PID: 1264 (xscreensaver)
CGroup: /user.slice/user-1000.slice/[email protected]/xscreensaver.service
└─1264 /usr/bin/xscreensaver -nosplash
答案1
首先，您应该从系统中删除其他屏幕保护程序（在您的情况下是 MATE 屏幕保护程序）以防止干扰：
sudo apt purge mate-screensaver mate-screensaver-common
然后通过以下方式启用 XScreenSaver 自动启动systemd用户服务：
systemctl --user enable xscreensaver.service
systemctl --user start xscreensaver.service
注意：您可以使用 来进行调试systemctl --user status xscreensaver.service。
然后等待超时和屏幕保护程序激活。