After the message of nclm, I decided to retest the ath5k driver from the backported modules. As the updates of 6 november, I was able to connect, but the connection was not stable and unusable. The dmesg is attached.
** Attachment added: "ath5K_problem" http://launchpadlibrarian.net/19435258/ath5K_problem -- intrepid madwifi ath5k with AR242x not detecting all wireless networks and link speed is very poor https://bugs.launchpad.net/bugs/275423 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