Description of problem:
With net, controlled by NetworkManager and ppp connection does not work dns
resolving

Version-Release number of selected component (if applicable):
NetworkManager-0.7.0-0.9.4.svn3675.fc9.i386

Steps to Reproduce:
Way A:
1. Set up a network with following parameters: IP: 192.168.0.2, SubNet:
255.255.255.0, Default gateway: 192.168.0.1, Primary DNS: 212.122.1.2, Secondary
DNS: 212.107.200.68. If gateway for some reasons does not work, i use GPRS internet.
2. Establish GPRS connection by gnome-ppp or system-config-network.
3. Try to ping 212.122.1.2 (DNS), or mail.ru (some site)
Way B:
1. Set up a network with following parameters: IP: 192.168.0.2, SubNet:
255.255.255.0, Default gateway: 192.168.0.1, Primary DNS: 212.122.1.2, Secondary
DNS: 212.107.200.68. If gateway for some reasons does not work, i use GPRS internet.
2. Disable network manager by uncheck "Net" checkbox in context menu of nm-applet.
3. Establish GPRS connection by gnome-ppp or system-config-network.
4. Try to ping 212.122.1.2 (DNS), or mail.ru (some site)
  
Actual results:
Way A: All of pings go to gateway, but gateway does not work for now, so i does
not have net.
Way B: Ping of 212.122.1.2 work! So i have net, but...  ping mail.ru write:
ping: unknown host mail.ru. So i still have not internet!

Expected results:
Internet must work in some of ways, because in Fedora 7 i used this methods:
when gateway was not worked, i choose "No network" in knetworkmanager and then
connected to GPRS by kppp. And all was fine!