2) There is strange behaviour of wired (eth0) connection that can be related to this problem:
There is an item "Auto eth0" in "Wired" tab in "Network Connection" dialog of nm
and it is set with "Connect automatically" and "System settings" on.
When I tried to uncheck "Connect automatically" and "System settings", it gets automatically
checked again after reboot. When I have completely deleted this "Auto eth0" item,
it was back after reboot (and with "Connect automatically" and "System settings" checked again).
Maybe this is related because then I have always two items with "Connect automatically"...
I am entering some additional information:
1) For that wireless connection I use a WEP key,
2) There is strange behaviour of wired (eth0) connection that can be related to this problem:
There is an item "Auto eth0" in "Wired" tab in "Network Connection" dialog of nm
and it is set with "Connect automatically" and "System settings" on.
When I tried to uncheck "Connect automatically" and "System settings", it gets automatically
checked again after reboot. When I have completely deleted this "Auto eth0" item,
it was back after reboot (and with "Connect automatically" and "System settings" checked again).
Maybe this is related because then I have always two items with "Connect automatically"...