Hi everybody, I have an Alfa AWUS036H USB Wifi adapter (Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter). It's using rt2800usb driver. I use netctl to connect to wifi.Here is my netctl profile: Description='Mine' Interface=wlp0s18f2u4 Connection=wireless Security=none ESSID=ncepu-student IP=static Address='10.110.7.7/24' Gateway='10.110.7.254' DNS=("8.8.8.8";"8.8.4.4") The problem is that 'ip addr show' says that I'm still connected to my wifi AP. I can see my IP and everything but I can't access internet. I can't even ping google or any other server. When I try to curl a local LAN web server, it says 'there is no route to xxx.xxx.xxx.xxx', where xxx.xxx.xxx.xxx is my local router. So I have to disconnect and reconnect every few minutes to use internet. Here are ping results to a local server (while still connected to wifi, as per 'ip addr'): PING yyy.yyy.yyy.yyy (yyy.yyy.yyy.yyy) 56(84) bytes of data. From 10.110.7.7 icmp_seq=1 Destination Host Unreachable From 10.110.7.7 icmp_seq=2 Destination Host Unreachable From 10.110.7.7 icmp_seq=3 Destination Host Unreachable From 10.110.7.7 icmp_seq=4 Destination Host Unreachable From 10.110.7.7 icmp_seq=5 Destination Host Unreachable From 10.110.7.7 icmp_seq=6 Destination Host Unreachable ^C --- yyy,yyy.yyy.yyy ping statistics --- 6 packets transmitted, 0 received, +6 errors, 100% packet loss, time 5008ms Where yyy.yyy.yyy.yyy is a server that is always available to all PCs connected to local LAN or wifi. I read somewhere that netctl and dhcp don't work well together so I changed DHCP to static IP*. I even tried changing the wifi access points (There are multiple APs around me). In all cases, I am able to connect to the AP and use internet, but only for a few minutes. For debugging, I removed the usb cable, and reattached the wifi adapter.Here are some entries from dmesg showing the plugging in of the adapter and subsequent connection trials. Note that I disconnected and reconnected the AP around [21713.142829]. [20962.199042] usb 6-4: new high-speed USB device number 3 using ehci-pci [20962.455180] usb 6-4: reset high-speed USB device number 3 using ehci-pci [20962.595540] ieee80211 phy1: rt2x00_set_rt: Info - RT chipset 3070, rev 0201 detected [20962.651113] ieee80211 phy1: rt2x00_set_rf: Info - RF chipset 0005 detected [20962.651670] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht' [20962.685678] rt2800usb 6-4:1.0 wlp0s18f2u4: renamed from wlan0 [20987.396145] ieee80211 phy1: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin' [20987.396184] ieee80211 phy1: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29 [20987.851414] IPv6: ADDRCONF(NETDEV_UP): wlp0s18f2u4: link is not ready [20989.368562] wlp0s18f2u4: authenticate with 74:25:8a:3f:79:d1 [20989.425297] wlp0s18f2u4: send auth to 74:25:8a:3f:79:d1 (try 1/3) [20989.434313] wlp0s18f2u4: authenticated [20989.439817] wlp0s18f2u4: associate with 74:25:8a:3f:79:d1 (try 1/3) [20989.444114] wlp0s18f2u4: RX AssocResp from 74:25:8a:3f:79:d1 (capab=0x8421 status=0 aid=130) [20989.450763] wlp0s18f2u4: associated [20989.450812] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s18f2u4: link becomes ready [21700.838273] ieee80211 phy1: rt2x00queue_flush_queue: Warning - Queue 14 failed to flush [21705.251761] IPv6: ADDRCONF(NETDEV_UP): wlp0s18f2u4: link is not ready [21713.142829] wlp0s18f2u4: authenticate with 74:25:8a:3f:79:d1 [21713.199602] wlp0s18f2u4: send auth to 74:25:8a:3f:79:d1 (try 1/3) [21713.201715] wlp0s18f2u4: authenticated [21713.204008] wlp0s18f2u4: associate with 74:25:8a:3f:79:d1 (try 1/3) [21713.210193] wlp0s18f2u4: RX AssocResp from 74:25:8a:3f:79:d1 (capab=0x8421 status=0 aid=130) [21713.218064] wlp0s18f2u4: associated [21713.218114] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s18f2u4: link becomes ready [21803.494111] INFO: NMI handler (perf_event_nmi_handler) took too long to run: 1.026 msecs I hope someone here can help me find a solution to this incredibly annoying problem. *With DHCP, I got disconnected from the wifi AP with 'journalctl' showing some errors about 'carrier lost'. With 'static IP', I don't get disconnected but can't access internet either.