Comment 14 for bug 124406

Same thing happened with mouse getting stuck this time at 13:22. It got stuck clicked on acroread. Acroread uses 100% when you click and hold on a document.

/var/log/daemon.log:
Aug 31 13:22:00 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
Aug 31 13:22:03 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
Aug 31 13:22:07 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
Aug 31 13:22:15 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12
Aug 31 13:22:27 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
Aug 31 13:22:31 localhost dhclient: No DHCPOFFERS received.

So the problem could very well be related to dhclient.