I have a similar problem with network manager. When I plug in my wireless card the computer completely freezes and an I have to do a hard reboot.
my wireless card uses the prism 2/2.5/3 chipset (it is a linksys wpc11 ver 3) this happens using both the orinoco and hostap drives for my card. (to get the hostap driver working i have to blacklist the orinoco_cs module ) also even after removing network manager, gnome becomes very sluggish. Applications take ages to load. -- network-manager blocks my keyboard https://launchpad.net/bugs/68364 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs