Main applications menu fails to drop down

[Stephen Wilson]

After upgrading Breezy to Dapper, the "Applications" menu (Main menu) on the panel
will not drop down. "Places and "System" menus work fine. Issue also exts when "Main
Menu" icon is installed as an add-on through the panel properties on either the top
or bottom panels.

[Mikel Ward (mikelward)]

"Will not drop down"?

Since I upgraded last night, the Applications menu appears very quickly then
disappears. It might be the same thing, but our descriptions are a little bit
different.

I am using the Clearlooks theme and Focus Follows Mouse.

[Ernst Persson (ernstp)]

Appears very quickly here too.

[Matt Edwards (mwedwards)]

http://www.ubuntuforums.org/showthread.php?p=516457

[essexman (ralphsmail)]

(In reply to comment #3)
> http://www.ubuntuforums.org/showthread.php?p=516457

Same for me. I have 28 "kept back" pacages showing on upgrade, which I am not
yet ready to attempt to force. There are no obvious culprits in the kept-back
list, but I have just "successfully (?)" upgraded to xcore 7.0 RC1 after
xserver borked. This appears to be the only problem with my Dapper install at
the moment.

[Senning Luk (senning-luk)]

Ditto. Ran gnome-panel on Xephyr and got the following. I assume workspace
switcher is actually fine, as it works on my desktop, and the first time I ran
Xephyr (without panel --verbose, which wasn't that useful).

As far as I can see, the possible problems are evolution.desktop being missing,
or something with !prefs_key at the end, when I actually tried opening the menu.

GTK Accessibility Module initialized
Unable to open desktop file /usr/share/applications/evolution.desktop for panel
launcher: Error reading file '/usr/share/applications/evolution.desktop': File
not found

** (gnome-panel:30847): WARNING **:
/build/buildd/gnome-panel-2.13.2/./gnome-panel/panel-applet-frame.c:1240: failed
to load applet OAFIID:GNOME_WorkspaceSwitcherApplet:
Failed to resolve or extend
'!prefs_key=/apps/panel/applets/workspace_switcher_screen0/prefs;background=none:;orient=down;size=x-small;locked_down=false

** (gnome-panel:30847): WARNING **:
/build/buildd/gnome-panel-2.13.2/./gnome-panel/panel-applet-frame.c:1240: failed
to load applet OAFIID:GNOME_WindowMenuApplet:
Failed to resolve or extend
'!prefs_key=/apps/panel/applets/applet_3/prefs;background=none:;orient=down;size=x-small;locked_down=false

(gnome-panel:30847): Gtk-CRITICAL **: gtk_drag_source_set_icon_name: assertion
`icon_name != NULL' failed

[Senning Luk (senning-luk)]

sorry, I misread. It's gtk_drag_source_set_icon_name that had a problem after I
opened the menu.

[Ernst Persson (ernstp)]

Change package to gnome-menus, or at least cc seb128 so the bug is noticed?

[Daniel Holbach (dholbach)]

Thanks for your input, but this bug was filed as
http://bugzilla.ubuntu.com/show_bug.cgi?id=20216 - if you have more information
on this one, please follow up on that one.

This bug has been marked as a duplicate of bug 36272.