update 14-08-2014 I was able to put usb wifi device working again by doing these steps : -downloading from mediatek.com this file : DPO_RT5572_LinuxSTA_2.6.1.3_20121022 -applying this patch : rt5592sta_fix_64bit_3.8.patch -compiling and installing the original drivers . - blacklisting these modules on modprobe.d blacklist rt2x00lib blacklist rt2x00usb blacklist rt2800lib blacklist rt2800pci blacklist rt2x00pci only by this way i was able to have usb device working again . ACPI errors still remain in dmesg report dmesg - k [ 7.936442] cfg80211: Calling CRDA to update world regulatory domain [ 8.512023] usb 2-5: reset high-speed USB device number 2 using ehci-pci [ 8.653014] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 3070, rev 0201 detected [ 8.707271] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 0005 detected [ 8.917806] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht' [ 8.918166] usbcore: registered new interface driver rt2800usb [ 9.765631] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [ 9.765633] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm) [ 9.765635] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm) [ 9.765637] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm) [ 9.765638] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm) [ 9.765640] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm) [ 9.765641] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm) [ 11.499320] rtusb init rt2870 ---> [ 11.499377] usbcore: registered new interface driver rt2870 [ 19.651296] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin' [ 19.713499] rt2800usb 2-5:1.0: firmware: direct-loading firmware rt2870.bin [ 19.713508] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29 [ 19.975057] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1003.577055] wlan0: authenticate with xx:xx:xx:xx:xx:xx [ 1003.627438] wlan0: send auth to xx:xx:xx:xx:xx:xx (try 1/3) [ 1003.631452] wlan0: authenticated [ 1003.632118] wlan0: associate with xx:xx:xx:xx:xx:xx (try 1/3) [ 1003.635582] wlan0: RX AssocResp from xx:xx:xx:xx:xx:xx (capab=0x431 status=0 aid=1) [ 1003.642561] wlan0: associated [ 1003.642606] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready