programs not shown in taskbar when not on main display

[Günter]

using intrepid + randr to have a virtual big desktop. when placing programs onto my second display, the apps are not shown in the taskbar

[Günter (guenter-grodotzki)]

ok this only happens when attaching the second head durgin gdm->login, when adding the second head via "screen resolutions" after login, everything works :)

[Adrian Wilkins (adrian-wilkins)]

Confirm this behaviour.

You can watch the button pop in and out of existence as you drag it from the right screen to the left screen and back again.

The bug seems to be that the window list considers windows on the right hand side of the virtual desktop to be in a different workspace.

Workaround :

1) You can work around it by configuring the window list applet to show windows from all workspaces. The downside of this is that ... it shows windows from all workspaces.

Workaround that doesn't quite work but does provide extra data :

2) Added an extra panel for the right hand screen, on the basis that if the left hand window list only lists windows from the left screen....

A window list in a panel on the right screen only lists windows
 * When their x-center is within the screen, and
 * When their x-0 is not.

ie - the applet starts to show the window after it's been half-dragged onto the screen, but as soon as it's fully visible on the right, it disappears.