Solve the Problem of unidentifiable TP-LINK Wireless Network Card On debian

Solve the problem that TP-LINK wireless network card cannot be identified on debian TP-LINK tl-wn721n driver Problem description: After inserting Wireless Network Card On debian system, the system does not reflect any. Dmesg indicates that the wireless network card has been identified, but the htc_9271.fw file [6372.304464] usb 2-6: USB disconnect is not found in the/lib/firmware/directory, device number 4 [6927.052039] usb 2-5: new high-speed USB device number 5 using ehci_hcd [6927.200902] usb 2-5: New USB device found, idVendor = 0cf3, idProduct = 9271 [6927.200906] usb 2-5: New USB device strings: Mfr = 16, Product = 32, SerialNumber = 48 [6927.200910] usb 2-5: Product: USB2.0 WLAN [6927.2009 12] usb 2-5: Manufacturer: ATHEROS [6927.200914] usb 2-5: SerialNumber: 12345 [6927.203718] usb 2-5: ath9k_htc: firmware-htc_9271.fw not found [6927.203731] ath9k_htc: probe of 2-5. 0 failed with error-22 www.2cto.com on the Internet to download this file (http://up.2cto.com/2012/0526/20120526095255715.zip), put/lib/firmware/, unplug the wireless network card and then plug in, the prompt information is as follows, link is not ready. Now we can see that 7127.561854] usb 2-6: ath9k_htc: USB layer initialized [7127.568367] Listen 80211: Regulatory domain changed to country: CN [7127.568370] Listen 80211: (start_freq-end_freq @ bandwidth), (max_antenna_gain, max_eirp) [7127.568374] 11680211: (2402000 KHz-2482000 KHz @ 40000 KHz), (N/A, 2000 mBm) [7127.568377] Listen 80211: (5735000 KHz-5835000 KHz @ 40000 KHz), (N/A, 3000 mBm) [7127.990370] ADDRCONF (NETDEV_UP): wlan0: link is not ready
Author: Wood r