[Xfce-bugs] [Bug 15648] New: Multiple panels wrongly overlay each other when

[bugzilla-daemon at xfce.org]

https://bugzilla.xfce.org/show_bug.cgi?id=15648

            Bug ID: 15648
           Summary: Multiple panels wrongly overlay each other when
    Classification: Xfce Core
           Product: Xfce4-panel
           Version: Unspecified
          Hardware: PC (x86_64)
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Medium
         Component: Panel
          Assignee: xfce-bugs at xfce.org
          Reporter: fluke at krneki.org
  Target Milestone: Panel 4.14

Hello,

I'm using multiple monitors (3) on several locations and have panels configures
in the following way:

Panel 0 is the "main" panel with menu, window and action buttons, tray icons.
Ouput is set to "Primary", which is always eDP-1 LCD display on ThinkPad T480s.

Panels 1-3 have Ouput assigned to different outputs (DP-1, HDMI-1, DP-2). These
panels only have Window Buttons configured, showing only applications from
these monitors and these outputs are never set as Primary. Each panel should
only be visible on certain output.

However when I undock laptop or disable additional outputs with xrandr. I see
random Panel 1-3 overlayed on top of Panel 0 on Primary eDP-1 output, hiding
its content. If I force panel redraw (switch mode from horizontal to vertical
and back to horizontal), panel then hides itself either behind Panel 0 (or out
of eDP-1). This is quite annoying as I lose menus and action buttons on my
primary monitor.

Tested with xfce4-panel 4.13.5 and with latest xfce4-panel-git
xfce+4.14pre1+36+g306856ca-1 on Arch Linux.

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