Ok, in fact, there is a revelant information in dmesg just before "Unknown symbol" errors :
[ 519.722102] usb 5-1: new high speed USB device using ehci_hcd and address 5 [ 520.028765] usb 5-1: configuration #1 chosen from 1 choice [ 520.243160] ieee80211_init: failed to initialize WME (err=-17) [ 520.248363] rt2x00lib: Unknown symbol ieee80211_register_hw [ 520.248639] rt2x00lib: Unknown symbol ieee80211_tx_status_irqsafe [ 520.248990] rt2x00lib: Unknown symbol ieee80211_ctstoself_get [ 520.249118] rt2x00lib: Unknown symbol ieee80211_start_queues [ 520.249367] rt2x00lib: Unknown symbol ieee80211_stop_queue ... -- [hardy] regresion (probably from alpha 4 to alpha 5) rt2x00lib: Unknown symbol https://bugs.launchpad.net/bugs/203758 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