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I have a Toshiba Satellite with Realtek 8723e 802.11n and running Ubuntu 12.04. I have installed the driver and all was well until this happened. It shows my network, but when I try to connect, it sort of keeps looping back to authenticate. I know my password is correct, and it isn't a problem with the network itself as it easily connects with other devices. Is it a problem with the driver? Some times it just miraculously connects. I have tried digging the forums but to no avail.

$ lshw -C network
WARNING: you should run this program as super-user.  
       description: Ethernet interface   
       product: AR8162 Fast Ethernet  
       vendor: Atheros Communications Inc.  
       physical id: 0    
       bus info: pci@0000:01:00.0  
       logical name: eth0  
       version: 10  
       serial: 00:26:6c:28:ae:c8   
       size: 100Mbit/s  
       capacity: 100Mbit/s  
       width: 64 bits  
       clock: 33MHz  
       capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt   100bt-fd autonegotiation  
       configuration: autonegotiation=on broadcast=yes driver=alx duplex=full   firmware=alx ip= latency=0 multicast=yes port=twisted pair speed=100Mbit/s  
       resources: irq:42 memory:88500000-8853ffff ioport:3000(size=128)   
       description: Wireless interface  
       product: Realtek Semiconductor Co., Ltd.   
       vendor: Realtek Semiconductor Co., Ltd.   
       physical id: 0    
       bus info: pci@0000:02:00.0   
       logical name: wlan0   
       version: 00   
       serial: 74:e5:43:bc:49:a3   
       width: 64 bits   
       clock: 33MHz   
       capabilities: bus_master cap_list ethernet physical wireless   
       configuration: broadcast=yes driver=rtl8723e driverversion=3.2.0-38-generic-pae   firmware=N/A latency=0 multicast=yes wireless=IEEE 802.11bgn     
       resources: irq:17 ioport:2000(size=256) memory:88400000-88403fff   
WARNING: output may be incomplete or inaccurate, you should run this program as super-   user.   
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Is your signal strong enough? Maybe it fails to establish a connection because the wireless signal is too weak. – darksky Mar 7 '13 at 6:42
I have kept it really close to the router, so signals must be strong enough – ABCD Mar 7 '13 at 9:20
Can you please post the output of this command lshw -C network? – darksky Mar 7 '13 at 9:33
The driver seems okay. Are you experiencing the same exact problem with different networks? Have you tried taking your laptop to a public cafe or a friends' house and try to connect to their wireless? – darksky Mar 7 '13 at 23:54

I had a similar problem, my solution was to change some connection settings. In my case it was changing the EAP Method to Protected EAP (PEAP).

This solution probably won't work for you, but it shows that your driver doesn't have to be the problem.

share|improve this answer
Thanks guys but I found the solution.It was a misbehaving network manager. Downloaded wicd and now works like a charm. – ABCD Mar 8 '13 at 7:38

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