As I wrote on similar bug 792007 I am always able to release the blocking by restarting network-manager. Try:
sudo service network-manager restart
Please leave a comment here if you know a permanent workaround to automatically unmount nfs shares BEFORE the network-manager disconnects.. It seems that scripts in /usr/lib/pm-utils/sleep.d/ get executed too late.
As I wrote on similar bug 792007 I am always able to release the blocking by restarting network-manager. Try:
sudo service network-manager restart
Please leave a comment here if you know a permanent workaround to automatically unmount nfs shares BEFORE the network-manager disconnects.. It seems that scripts in /usr/lib/ pm-utils/ sleep.d/ get executed too late.