me to nedalo a trosku jsem si o tom problemu cetl, je to nahlasene jako bug v ubuntu uz od roku 2010 a podle diskuze to asi prebrali z debianu;)
funguje jim tenhle workaround :
I have found a workaround for this issue on 10.04.
Open up Applications->Accessories->Passwords and Encryption Keys
Right click Passwords:login and unlock it.
You should be able to expand the tree and find a listing for vino. Right click and delete it.
Close Passwords and Encryption Keys.
Open gconf-editor as and navigate to /desktop/gnome/remote_access
Enter in your BASE64 encoded password into the vnc_password key.
Save the config and close the editor.
Reboot and you can now use your VNC client to connect to your machine without being first prompted with the keyring.
na tyhle strance si muzes premenit heslo do base64 (vubec netusim co to je a stranka je asp;)
http://www.motobit.com/util/base64-decoder-encoder.asp