dmesg | tail 
[14675.228028] ieee80211 phy1: rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16)
[14675.228036] ieee80211 phy1: rt2x00lib_autowakeup: Error - Device failed to wakeup
[14677.072032] ieee80211 phy1: rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16)
[14677.072040] ieee80211 phy1: rt2x00lib_autowakeup: Error - Device failed to wakeup
[14678.196028] ieee80211 phy1: rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16)
[14678.196036] ieee80211 phy1: rt2x00lib_autowakeup: Error - Device failed to wakeup
[14680.060028] ieee80211 phy1: rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16)
[14680.060035] ieee80211 phy1: rt2x00lib_autowakeup: Error - Device failed to wakeup
[14681.168029] ieee80211 phy1: rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16)
[14681.168037] ieee80211 phy1: rt2x00lib_autowakeup: Error - Device failed to wakeup