Maybe this well help you to try without network manager.
http://ubuntuforums.org/showthread.php?t=571188
- [Trisquel-users] wireless problem mtsio
- [Trisquel-users] Re : wireless problem lcerf
- [Trisquel-users] Wireless Problem travis
- Re: [Trisquel-users] Wireless Problem tomlukeywood
- Re: [Trisquel-users] Wireless Problem t8mf4nu6lizp
- Re: [Trisquel-users] Wireless Problem davesamcdxv
- Re: [Trisquel-users] Wireless Problem cooloutac
- Re: [Trisquel-users] Wireless Problem cooloutac
- Re: [Trisquel-users] Wireless Problem travis
- Re: [Trisquel-users] Wireless Problem onpon4
