With multi-monitor setup and workspaces, maximized windows wander around

[Michał Sawicz]

It often happens when resuming, sometimes when focusing a maximized window (especially one that's urgent), it will change the screen it's maximized on.

I'll try and add exact steps to reproduce when I find them, but maybe someone already knows.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity 7.3.1+14.10.20140811-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-10.15-generic 3.16.1
Uname: Linux 3.16.0-10-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.14.6-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Thu Aug 28 22:54:08 2014
SourcePackage: unity
SystemImageInfo: Error: [Errno 2] Nie ma takiego pliku ani katalogu: 'system-image-cli'
UpgradeStatus: No upgrade log present (probably fresh install)

[Christopher Townsend (townsend)]

Hey Saviq,

First, when you say "multi-monitor", I assume you have a laptop with an external monitor attached, right?

If so, are these maximized windows that are moved the ones that were on the external monitor? Also, when the machine suspends, the external monitor goes standby or powers off and then powers back on when resuming, right? I'm betting that the external monitors takes a bit of time to power on, so Compiz only sees one monitor for a bit and moves the window to the existing monitor. However, Compiz does not keep track of the lost monitor at this point and then when the monitor fully powers on and then presents itself, you left with the maximized window in the "wrong" screen.

Let me know if my hunch seems reasonable for your case.

[Michał Sawicz (saviq)]

Well, it could explain the suspend/resume case indeed, there's actually a twist... more often the windows move *to* the external screen, not to the laptop screen.

Or well, I rarely have maximized windows on the external screen so have not noticed that behaviour.

And then there's the case when there's no suspend coming into play, a window gets the urgent flag, I click on the icon in the launcher and the window has moved to the second screen.