Apps re-arranged on 2 screens config. after unlocking

[Lorenzo]

Hi,

I have Ubuntu 16.04 installed on a Dell Latitude 3350. I have also an external monitor, HDMI connected.

When I lock my screen (ctrl+alt+l) and unlock it after a while (without any system suspension happened) my program windows are all placed on one screen (the external one, because, I think, it is the closest to the top-left corner).

this misplacing happens when the HDMI external monitor does not go into suspension mode (some seconds after the screen is locked): I think ubuntu does not longer see two monitors and then aggregate all windows in one screen; when I unlock, ubuntu place all of them in the external screen, even if it was the one suspended, because it becomes the main (top-right) one.

Anyone suffer the same unwanted behaviour or can suggest a solution?
How can I force the external monitor to not go suspended, ad/or ubuntu to hold it alive?

thank you,
lorenzo

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1621860/+editstatus and add the package name in the text box next to the word Package.

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