@Teej: Yes, on Software Sources/Ubuntu Software/Downloadable from the Intert/Download from/ is selected "Main Server". Also all other check boxes are marked.
Since I could not identify the address for "Main Server" I chose morrors.us.kernel.org/ubuntu just to see if it cause any difference. But no update was offered. My uname -a is still the same.
@Teej: Yes, on Software Sources/Ubuntu Software/ Downloadable from the Intert/Download from/ is selected "Main Server". Also all other check boxes are marked. us.kernel. org/ubuntu just to see if it cause any difference. But no update was offered. My uname -a is still the same.
Since I could not identify the address for "Main Server" I chose morrors.