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
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https://bugs.launchpad.net/bugs/837621
Title:
Sweex LW153 (RT3070 based) wifi USB disconnects at random
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