Comment 12 for bug 535065

As workaround, you can use this tool: it will relaunch the dock after wake-up from suspend:

 * Download the attachment
 * Install a few dependences:
   $ sudo apt-get install -y build-essential pkg-config libgtk-3-dev libdbus-glib-1-dev
 * Compile this program (open a terminal in the same directory of the file that you just downloaded):
   $ gcc refresh_cd_on_resuming.c -o refresh_cd_on_resuming `pkg-config --libs --cflags gtk+-3.0 dbus-glib-1`
 * Launch it:
   $ ./refresh_cd_on_resuming

But please note that it's a workaround ;) (feel free to post new messages to nVidia devs)