According to Xscreensaver documentation if you can reproduce the bug type the following into the Terminal and try to retest the problem...post your log file here...
http://www.jwz.org/xscreensaver/bugs.html $ xscreensaver-command -exit $ xscreensaver -verbose -log log.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1015297 Title: Screen partially darkened after suspend and resume in Xubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/pm-utils/+bug/1015297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs