Following Straximus's lead (https://bugs.launchpad.net/mythbuntu/+bug/1308105/comments/18), I downgraded to the xfce4-settings package from Saucy. I left the machines allow all weekend long, and this morning the video on both machines worked as expected.
There is a regression bug between xfce4-settings 4.11.0-1ubuntu1 (saucy) and 4.11.2-1ubuntu2 (trusty). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1313539 Title: monitor shows black screen and "no input signal" after turning the monitor off and on manually To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-settings/+bug/1313539/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
