Do the crashes ever occur when using iwconfig/dhclient? NM and wpasupplicant shouldn't be able to cause hard crashes without help from the driver. Since you're using ndiswrapper, it seems _very_ likely the driver you're using is partially broken.
Another route to try would be to see if you can find a newer win32 ACX111 driver and see if the locks occur while using that too? -- Semi-random hard crashes when using nm-applet https://launchpad.net/bugs/64579 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
