I again attempted to upgrade to 11.10.

The screen1 again was white, I used the right mouse button and got a
popup menu.  I selected "create a new folder" and the white screen
disappeared leaving the wallpaper.

I installed "Gnome shell" and "Gnome Tweak Tool".  ccsm was installed.

I restarted selecting Gnome classic, which opened with the white
screen1.  Right mouse button again and the white disappeared.  There
were no panels in screen0 or screen1.

I opened ccsm and set my regular properties.  no change.

To remove unity, I ran:
:~$ sudo apt-get remove unity unity-2d-places unity-2d unity-2d-panel 
unity-2d-spread unity-asset-pool unity-services unity-lens-files 
unity-lens-music unity-lens-applications gir1.2-unity-4.0 unity-common 
indicator-sound indicator-power indicator-appmenu libindicator6 
indicator-application evolution-indicator indicator-datetime indicator-messages 
libnux-1.0-0 nuxtools

and got this result:
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package nuxtools

then: sudo apt-get install nuxtools
[sudo] password for ***: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package nuxtools

I ran: 
:~$ gnome-panel

(gnome-panel:26730): Gtk-CRITICAL **: gtk_style_context_get: assertion 
`priv->widget_path != NULL' failed
Segmentation fault

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https://bugs.launchpad.net/bugs/1001712

Title:
  2nd screen unuseable after upgrade to 11.10

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