Greetings.
Lately whenever I launch GTK+ applications over x2go, the pull-down menus are usually not displayed properly or at all.
For example, if I launch the Xfce Terminal, I see the usual "File", "Edit", "View", "Terminal", "Tabs", and "Help" labels in the pull-down menu bar. If I click on these, they become underlined as though they are active, but the corresponding pull-down menu doesn't (usually) appear. Instead, a single pixel in the upper left corner of my desktop turns white. The only exception is when I click on "Help" -- the first time I do this, I do get a pull-down menu, but it's attached to the upper left corner of my desktop, not to the "Help" label in the Terminal window. The menu is very small, though, and I need to scroll through it to see all the entries. The second or subquent times I try to view the "Help" menu, I just get a single pixel.
Similar behaviour is observed in most other GTK+2 and GTK+3 applications, such as the GNOME Terminal and the GNOME Character Map. The problem is reproducible when launhcing LibreOffice with SAL_USE_VCLPLUGIN=gtk2 or SAL_USE_VCLPLUGIN=gtk3, but not with SAL_USE_VCLPLUGIN=kde4 or SAL_USE_VCLPLUGIN=gen. Some (but not all) of the applications output error messages like this to the console when I try to activate a pull-down menu:
(gucharmap:26208): Gtk-CRITICAL **: gtk_widget_get_preferred_height_for_width: assertion 'width >= 0' failed
(gucharmap:26208): Gtk-CRITICAL **: gtk_widget_get_preferred_height_for_width: assertion 'width >= 0' failed
(gucharmap:26208): Gtk-CRITICAL **: gtk_widget_get_preferred_height_for_width: assertion 'width >= 0' failed
(gucharmap:26208): Gtk-WARNING **: Negative content width -7 (allocation 1, extents 4x4) while allocating gadget (node arrow, owner GtkMenu)
(gucharmap:26208): Gtk-WARNING **: Negative content width -7 (allocation 1, extents 4x4) while allocating gadget (node arrow, owner GtkMenu)
Claws Mail seems to be an exception; it uses GTK+ but its pull-down menus work fine.
Anyone know what the cause might be and how I can work around it? I'm running x2goserver-4.0.1.19 on an openSUSE Tumbleweed server and x2goclient-4.0.5.0 on an openSUSE 13.2 client. The client desktop environment is KDE 5.
Regards, Tristan
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Tristan Miller