I have installed an Asus PCE-N15 wireless adapter on my Ubuntu 14.04 install. It sees and connects easily to Wireless networks, but it only connects at 1Mb/s when connected to my TP-Link TL-WR340G wireless router. My wireless security settings on the router are WPA2-PSK with AES as the security option. The weird thing is that when I connect to my mobile phone hotspot, it connects at full speed and I can browse the internet no problem.
This is the output of nm-tool | more:
NetworkManager Tool State: connected (global) - Device: wlan0 [THWIRELESS] -------------------------------------------------- Type: 802.11 WiFi Driver: rtl8192ce State: connected Default: no HW Address: E0:3F:49:8B:89:82 Capabilities: Speed: 1 Mb/s Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points (* = current AP) KK1690: Infra, 00:1D:0F:F0:2D:3C, Freq 2437 MHz, Rate 54 Mb/s, Strength 40 WPA