Ubuntu wifi connects and works for 5 minutes then stops working while remaining connected

I have my 1TB hard drive split even between ubuntu 14.04 and windows 10.

wifi and ethernet work great in windows, and wifi works great in ubuntu–for about five minutes. ethernet doesn't really work at all anymore, but it used to. the icon stays as though i'm connected, but i can't access perform any functions that would require an internet connection.

here's the result from ifconfig:

eth0      Link encap:Ethernet  HWaddr 1c:39:47:21:2a:d9  
      UP BROADCAST MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
      inet addr:127.0.0.1  Mask:255.0.0.0
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING  MTU:65536  Metric:1
      RX packets:165 errors:0 dropped:0 overruns:0 frame:0
      TX packets:165 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:11993 (11.9 KB)  TX bytes:11993 (11.9 KB)

wlan0     Link encap:Ethernet  HWaddr 30:52:cb:74:e0:53  
      inet addr:192.168.0.13  Bcast:192.168.0.255  Mask:255.255.255.0
      inet6 addr: fe80::3252:cbff:fe74:e053/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:183 errors:0 dropped:0 overruns:0 frame:0
      TX packets:190 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:17470 (17.4 KB)  TX bytes:26540 (26.5 KB)

for my network adapters:

ETHERNET: Realtek PCIe GBE Family Controller
WIRELESS: Qualcomm Atheros QCA61x4 Wireless Network Adapter