This bug is definitely still present in Ubuntu 12.04 I think this is what's in dmesg around the time it disconnects:
1 [119986.967651] cfg80211: Regulatory domain changed to country: TT 2 [119986.967654] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) 3 [119986.967657] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm) 4 [119986.967660] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm) 5 [119986.967663] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) 6 [119986.967666] cfg80211: (5490000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) 7 [119986.967669] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm) 8 [119996.205348] usbcore: deregistering interface driver rt2800usb 9 [119996.220336] wlan0: deauthenticating from 00:16:0a:0f:24:c0 by local choice (reason=3) 10 [119996.276217] cfg80211: All devices are disconnected, going to restore regulatory settings 11 [119996.276223] cfg80211: Restoring regulatory settings 12 [119996.276228] cfg80211: Calling CRDA to update world regulatory domain My USB Wifi Card is: Bus 001 Device 012: ID 1737:0078 Linksys WUSB100 v2 RangePlus Wireless Network Adapter [Ralink RT3070] ** Changed in: linux (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/837621 Title: Sweex LW153 (RT3070 based) wifi USB disconnects at random To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/837621/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs