An additional point of reference: the problem happens when trying to shutdown using the Gnome GUI dialog. From the command line ("shutdown -h now"), shutdown works fine. The problem is only with the Gnome graphical mechanism, not shutdown in general (I haven't tried KDE or other desktop environments).
An additional point of reference: the problem happens when trying to shutdown using the Gnome GUI dialog. From the command line ("shutdown -h now"), shutdown works fine. The problem is only with the Gnome graphical mechanism, not shutdown in general (I haven't tried KDE or other desktop environments).