menus appearing in wrong location on 3-head display

[Eric Blade]

Image shows example. Opening the "File" menu in gnome-terminal with a maximized window on far right display results in the menu spilling over into the middle display (middle of 3). Right clicking on gnome-terminal, the pop-up menu appears aligned to the far left edge of the 3rd display. On the other two displays, the pop-up menu appears at the location of the right-click. This occurs when matching WinSwitch? 0.12.20 to Xpra 0.12.5 on Windows, not really able to test elsewhere at the moment.

[Antoine Martin]

More info: server is Ubuntu 14.04.
This is probably because of the missing ​FakeXinerama, does installing it and restarting the sessions fix things?

Another possibility is that the triple monitors resolution is bigger than what the default xpra Xdummy configuration allows (5120x3200). Is so, bumping the ram and maybe adding the required resolution to /etc/xpra/xorg.conf should solve that.

Note: this is an xpra bug, and should have been filed here: ​http://xpra.org/trac/ (never mind)

[Nathan Rennie-Waldock]

Possibly related. Some menus in Firefox appear in the wrong location (single monitor, 1440x900px. Also on my 1024x600 netbook)