I'm also affected by the problem, with gtk+3 3.24.11 and xfce4 panel 4.14.0.
When I run xfce4-panel with PANEL_DEBUG=systray I see the following in the debug log: xfce4-panel(external): xkb-3: child is embedded; 7 properties in queue xfce4-panel(systray): registered manager on screen 0 xfce4-panel(systray): socket networkmanager applet[0x1244f30] (composited=false, relative-bg=false xfce4-panel(systray): added networkmanager applet[0x1244f30] icon xfce4-panel(systray): socket clipman[0x14fe490] (composited=false, relative-bg=false xfce4-panel(systray): added clipman[0x14fe490] icon I tried to dig into that a bit and that lead me to systray_socket_realize function: https://git.xfce.org/xfce/xfce4-panel/tree/plugins/systray/systray- socket.c?h=xfce-4.14.0#n122 Yes, we're not compositing, as the compositing is disabled, so this is expected. But relative-bg is not set, too -- apparently, the visuals of the socket widget and its parent differ. And indeed, they are. Here is a part of my gdb session: (gdb) step gtk_widget_get_visual (widget=0x434f30) at gtkwidget.c:11685 11685 g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); (gdb) finish Run till exit from #0 gtk_widget_get_visual (widget=0x434f30) at gtkwidget.c:11685 0x00007ffff7fc3dd8 in systray_socket_realize (widget=0x434f30) at systray-socket.c:139 139 else if (gtk_widget_get_visual (widget) == Value returned is $7 = (GdkVisual *) 0x43c590 (gdb) step gdk_window_get_parent (window=window@entry=0x6f20c0) at gdkwindow.c:2436 2436 g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); (gdb) finish Run till exit from #0 gdk_window_get_parent (window=window@entry=0x6f20c0) at gdkwindow.c:2436 0x00007ffff7fc3de3 in systray_socket_realize (widget=0x434f30) at systray-socket.c:139 139 else if (gtk_widget_get_visual (widget) == Value returned is $8 = (GdkWindow *) 0x434900 (gdb) step gdk_window_get_visual (window=0x434900) at gdkwindow.c:2288 2288 g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); (gdb) finish Run till exit from #0 gdk_window_get_visual (window=0x434900) at gdkwindow.c:2288 0x00007ffff7fc3deb in systray_socket_realize (widget=0x434f30) at systray-socket.c:139 139 else if (gtk_widget_get_visual (widget) == Value returned is $9 = (GdkVisual *) 0x442850 (gdb) p *((GdkVisual *) 0x43c590) $10 = {parent_instance = {g_type_instance = {g_class = 0x43c090}, ref_count = 2, qdata = 0x0}, type = GDK_VISUAL_TRUE_COLOR, depth = 24, byte_order = GDK_LSB_FIRST, colormap_size = 256, bits_per_rgb = 8, red_mask = 16711680, green_mask = 65280, blue_mask = 255, screen = 0x43a020} (gdb) p *((GdkVisual *) 0x442850) $11 = {parent_instance = {g_type_instance = {g_class = 0x43c090}, ref_count = 2, qdata = 0x0}, type = GDK_VISUAL_TRUE_COLOR, depth = 32, byte_order = GDK_LSB_FIRST, colormap_size = 256, bits_per_rgb = 8, red_mask = 16711680, green_mask = 65280, blue_mask = 255, screen = 0x43a020} So, the widget has 24 bit visual, but it's parent has 32 bit visual, so no parent-relative background. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797417 Title: Background of system tray icons not drawn properly To manage notifications about this bug go to: https://bugs.launchpad.net/xfce4-panel/+bug/1797417/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
