I confirm that. Xubuntu's default session is "Run XClient script" which fails to load any screensavers. Might be a problem with the XClient script? Choose "Xfce session" in gdm and the screensaver, xflock4 will work fine.
What extra things that the XClient script actually does and where is it located? -- xfce4-panel lock screen button not working https://bugs.launchpad.net/bugs/200665 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs