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Yesterday I upgraded from Ubuntu 12.10 to 13.04. I absolutely loved it until I realized the wireless connection would only last for about five minutes and then become unusable. I searched all over and ended up trying this and this. Nothing was working so I eventually reverted back to using 12.10 and everything is working great again. I would love to be using 13.04 right now so I am asking for help with this issue.

Here is some of the info I got for my system after I re-installed 12.10, let me know if any other information would be helpful. Thanks!

*-network                      description: Ethernet interface
   product: RTL8111/8168B PCI Express Gigabit Ethernet controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0.2
   bus info: pci@0000:02:00.2
   logical name: eth0
   version: 0a
   serial: 20:6a:8a:80:f3:58
   size: 10Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp   mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8411-1_0.0.3 06/18/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
   resources: irq:43 ioport:2000(size=256) memory:f0404000-f0404fff memory:f0400000-f0403fff
   description: Wireless interface
   product: AR9462 Wireless Network Adapter
   vendor: Atheros Communications Inc.
   physical id: 0
   bus info: pci@0000:03:00.0
   logical name: wlan0
   version: 01
   serial: 44:6d:57:b0:fc:5b
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
   configuration: broadcast=yes driver=ath9k driverversion=3.5.0-27-generic firmware=N/A ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
   resources: irq:19 memory:f0500000-f057ffff memory:dfa00000-dfa0ffff
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