Well, what do you know - I enabled workspaces in a 2x2 configuration, then locked the screen, turned off both monitors, turned them back on, and the two windows I had in the right-hand monitor disappeared. When I clicked the launcher icon for them, they immediately showed up in the workspace in the upper-right hand corner of the grid.
I just did it a second time, and it happened again - I think you must be right that it's the turning off of the monitors that's causing it now. It seems like I have a pretty reproducible test case, so maybe I could find time to try your package this week before I'm unavailable again for a while. Also in case it helps, I believe that just locking the screen back in 13.10 would set it off - I don't think I had to turn off the monitors. I'm thinking the reason that I haven't run into this consistently in 14.04 is that I haven't been leaving a lot of windows open when I go home and turn off the monitors; I think that I've just been closing most of them before leaving. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1257327 Title: 10de:06fd [Dell Precision T5500] Ubuntu 13.10 dual monitor screen lock causes windows to disappear off-screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1257327/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs