So, I finally purchased a high resolution external monitor for my 12" 1280x768 subnotebook (intel 915 grafics),
and I have a one month old Felicia installation (updated, upgraded).
After some googling I managed to make the external monitor to work under Felicia (connected to NB via VGA).
Well, to the extend...
The way I did it: Alt-F8 (don't know if it had any impact), then C-A-backspace to restart Xorg,
then chose a proper resolution both for the notebook and external screen using the tool "Configure display settings" which has nicely appeared in the tray itself (it's Mint!). (Before doing it the resolution on my notebook and the display was set to 1024x768 both).
Now the first weird things (compared to how it works in Windows):
1) the desktop icons on my notebook are not visible on the external monitor. I can accept it, because I can move the cursor to the right beyond the external monitor desktop and it appears on my notebook screen, so that I can call applications from the notebook desktop).
2) some applications: opera (but not mozilla, midori or kazehakaze), giver, skype, Openoffice ... when called from the external monitor desktop are appearing on the notebook screen, so that I have to drug them to the left so that they appear on the external monitor.
In a sense, these small problems are very minor and are easy to adapt to and even like. Maybe they are just features of the linux way of working with external monitors? I just want to be sure that my installation of the external monitor went right.
PS: After having tried many other distros I still return to Mint for my everyday work. Many thanks to the developers!
My learning of linux is slow but I hope to be able one day to build from Arch or Debian a linux for my own needs which will be as usable as Mint!