Black screen on quartered apps with a 5th overlapping

[Dave Morley]

STEPS:
1. open the following 5 apps in the deb version of unity8:
mines
thunderbird
firefox
ubuntu-terminal-app
system-settings
2. Open a youtube video in firefox
3. Sign into an email account on thunderbird
4. Start a game of mines
5. tail -f ~/.cache/upstart/unity8.log in terminal
6. Drop these four apps 1 in each corner so you see all four
7. Drop system-settings in the middle over lapping the other four

EXPECTED:
All 5 apps to run without issue

ACTUAL:
One of the apps will randomly trigger a blank window and title bar to overlay the entire screen. If mines triggers it just displays the title bar no idea why it is different. Thunderbird and Firefox seem to be the main culprits.

[Michał Sawicz (saviq)]

There's a chance XMir plays a role in this, too.

[gf (gf-interlinks-deactivatedaccount)]

Hello Dave,
Thank you for submitting this bug and reporting a problem with screen layout in Ubuntu. You made this bug report some time ago and Ubuntu has been updated since then.

Could you confirm that this is no longer a problem and that we can close the ticket?
If it is still a problem, are you still interested in finding a solution to this bug?
If you are, could you let us know and, run the following (only once):
apport-collect 1672335
and upload the updated logs and and any other logs that are relevant for this particular issue.

Thank you again for helping make Ubuntu better.
G

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity8 (Ubuntu) because there has been no activity for 60 days.]