Plank cannot be "unhidden" when using dual monitors

[Chris Habasinski]

When using dual monitors, once Plank hides itself due to a maximized application, it cannot be shown again by moving the cursor to the bottom of the screen.

This functionality works when I am in single monitor mode.

Hardware: HP Pavilion dv5 laptop with built-in 15" screen, external 19" Dell monitor.
Problem exists if displays are mirrored or not.
Problem exists if displays are aligned top or bottom in Display setting.
Problem exists with all Dock settings (I use Hide on Maximize)

[Nathan Lowe (techwiz96)]

I noticed this behavior on a fresh boot when a second monitor is attached. Killing plank (and I assume cerbere restarts it) fixes the problem. As with Chris, I do not experience this problem when the computer is started with only the primary monitor (in my case, the laptop screen) attached.

[Timbba (timbba)]

When playing with dual monitors, Plank positions itself wrongly. It is easy to reproduce by unplugging and replugging second display. If you don't touch into resolution settings, Plank is positioned wrongly. So when adding second display I have to always play with Displays on System settings. Annoying and in Luna this worked far better.

My guess is that Plank is not listening on display changes (added display, unplugged display, etc..). It just listens screen resolution changes when it positions itself. That is just my guess :)

[Rico Tzschichholz (ricotz)]

Be aware of this restriction https://bugs.launchpad.net/plank/+bug/1357859/comments/2

[Rico Tzschichholz (ricotz)]

@timbba: Please try to reproduce your particular issue while running r1221

[Timbba (timbba)]

@ricotz: I'm already using r1296 and this still doesn't work.

[Rico Tzschichholz (ricotz)]

@timbba: You are kind of hijacking this bug which not about your mentioned problem.

Despite that I am not able to reproduce it with my "simple" multimon-setup: latop + external-monitor (set as primary) with plank following the primary-monitor; connecting/disconnecting the external-monitor results in the expected behaviour: wingpanel+plank gets moved to the external-monitor on connect and moved back to the laptop on disconnect.

Please file a new bug for your issue and describe your actions and used settings.

[Timbba (timbba)]

@ricotz: Ok, sorry about extending the bug description. I will create another bug report.

[Timbba (timbba)]

@ricotz: new bug for my problems, https://bugs.launchpad.net/pantheon-dock/+bug/1467401