It seems to work when trying this in qemu.

Created attachment 335070 [details]
Screenshot of GtkStatusIcon activate menu

It seems the problem happens in VirtualBox guest only.

The top left in the screenshot shows the broken menu and the following message is output:

** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug

+ Trace 236642

What does the gtk inspector say about monitors in this situation (in the general tab) ?

(In reply to Matthias Clasen from comment #3)
> What does the gtk inspector say about monitors in this situation (in the
> general tab) ?

I can see the following information:

GTK+ Version                       3.21.5
GDK Backend                        X11

Display                            :1.0
RGBA visual                        v
Composited                         v
Monitor 0
  Geometry                         0 x 0 at 0, 0
  Size                             203 x 203 mm^2
  Primary                          v
  Refresh rate                     unknown
  Subpixel layout                  unknown

GL Version                         GLX 1.4
GL Vendor                          Mesa Project and SGI
GLX_ARB_create_context_profile     v
GLX_EXT_texture_from_pixmap        v
GLX_ARB_multisample                v
GLX_EXT_visual_rating              v

Seat 0                             Pointer, Keyboard
  Virtual core XTEST keyboard      Keyboard
  Power Button                     Keyboard
  Sleep Button                     Keyboard
  Video Bus                        Keyboard
  AT Translated Set 2 keyboard     Keyboard
  Virtual core XTEST pointer       Mouse
  Virutal USB Tablet               Mouse
  Axes                             X, Y
  ImExPS/2 BYD TouchPad            Mouse

It seems the problem is not GtkStatusIcon only but also any windows cannot set the coordinates.

Even if I set GTK_WIN_POS_CENTER, The window position is (0, 0) but not the center.

int
main (int argc, char *argv[])
{
    GtkWidget *popup;
    gtk_init (&argc, &argv);
    popup = g_object_new (GTK_TYPE_WINDOW,
                          "type", GTK_WINDOW_POPUP,
                          "window-position", GTK_WIN_POS_CENTER,
                          NULL);
    GtkWidget *label = gtk_label_new ("test");

    gtk_container_add (GTK_CONTAINER (popup), label);

    gtk_widget_show_all (popup);
    gtk_main ();
    return 0;
}

Created attachment 335210 [details] [review]
Patch to enable RandR on VirtualBox

OK, I found the root cause.

On standalone, XRROutputInfo->name is not "default".
On VirtualBox guest, XRROutputInfo->name is "default" but RANDR 1.5 is enabled.

This patch fixes both the GtkStatusIcon activate menu and the position of the centered popup menu.

I'm interested in what is the usable data compatible in RandR 1.2+.

I've reverted this change, since it was causing problems with several X servers.

Seems the current GTK does not have the original bug even if the change is reverted.
I will comment later if I find any problems.

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