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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.  
  *-network                  
       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=192.168.1.15 latency=0 multicast=yes port=twisted pair speed=100Mbit/s  
       resources: irq:42 memory:88500000-8853ffff ioport:3000(size=128)   
  *-network   
       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.   
share|improve this question
    
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

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