these might be helps : http://www.aircrack- ng.org/doku.php?id=rtl8187&DokuWiki=29d1fd52ad6ffb6e2590fa8ec32dc095
just try install compat wireless from synaptic. -- Alfa AWUS036H wireless disconnects after 1min on Karmic Koala 9.10 https://bugs.launchpad.net/bugs/455354 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs