After a long research I found that most probably there is a problem with madwifi drivers and motherboard interrupts....
check your /proc/interrupts to see if there is any conflict (wifi interface is using the same interrupt with anything else). I changed the motherboard (even if it was a brand new one!!!) and now the problem has totally disappeared!!! No errors in the logs, no crashes at all and my three wifi cards works absolutely fine! -- Madwifi (atheros) driver malfunction induces a system freeze https://bugs.launchpad.net/bugs/276445 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
