The TP-Link TL-WN751ND is a PCI WiFi network card that bases on an Atheros chipset. The card has the PCI ID 158c:0301 and is fully supported by the Linux kernel (e.g. Ubuntu 13.03):
04:00.0 Network controller : Atheros Communications Inc. AR9227 Wireless Network Adapter [168c:002d] (rev 01) Subsystem: Atheros Communications Inc. Device [168c:0301] Kernel modules: ath9k
The card gets recognized automatically and the necessary kernel module ath9k is loaded automatically
ath: EEPROM regdomain: 0x809c ath: EEPROM indicates we should expect a country code ath: doing EEPROM country->regdmn map search ath: country maps to regdmn code: 0x52 ath: Country alpha2 being used: CN ath: Regpair used: 0x52 ieee80211 phy0: >Selected rate control algorithm 'ath9k_rate_control' Registered led device: ath9k-phy0
If kernel version older than 3.3 are used the kernel module can cause a freezing of system if a WiFi connection has been established. This bug has been solved in kernels later than version 3.3.