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Suddenly after Ubuntu freeze I am unable to connect to my router. I have already reset my router but nothing has happend. If i connect my ubuntu with my andriod wlan router it works fine. I have tried lot of things: changed router setting, restarted network- manager, deleted old networks and there is no black list on my router, turned off power management etc. but it still doesn't work with my router. On the other hand i m able to connect with my router from other linux distributions like mint from other computers. Router also works fine with win7 OS.

It's very confusing!!

I have technicolor router from upc. My Wlan0: Ralink Technology RT2501/RT2573.

so again it works fine with other router (andriod mobile) but not with technicolor. But technicolor works fine with Mint,Win7 and Andriod devices but not only with Ubuntu.

Answer1: Laurent Ubuntu 12.04.04 --- ifconfig

      Wlan0: Link encap:Ethernet  HWaddr 00:12:bf:c4:8c:f2 

      inet6 addr: fe80::212:bfff:fec4:8cf2/64 Scope:Link

      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

      RX packets:37 errors:0 dropped:0 overruns:0 frame:0

      TX packets:112 errors:0 dropped:0 overruns:0 carrier:0

      collisions:0 txqueuelen:1000 

      RX bytes:5681 (5.6 KB)  TX bytes:26298 (26.2 KB)

"Answer comment-1:Parto" youtube but true :) with alt+print+B (R E I S U B) Good point, i think that would be a problem. Because right after rebooting i was unable to connect to my router. But i have checked couple of config files & compared thier output on forums. But i must have missed somthing.

Booted yes,I have rebooted couple of times. Still there is same problem.

rfkill list Output
0: phy0: Wireless LAN Soft blocked:no Hard blocked :no

share|improve this question
    
What caused the ubuntu freeze you mention and how did you resolve it? –  Parto Apr 25 at 7:16
    
youtube but true :) with alt+print+B (R E I S U B) –  user14466 Apr 25 at 7:22
    
Please provide more info by using the comments not editing the question, see this question in stack exchange meta for why. –  Parto Apr 25 at 7:36
    
Have you tried rebooting Ubuntu? –  Parto Apr 25 at 7:36
    
More than 10 times. –  user14466 Apr 25 at 7:37
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1 Answer 1

On which version of Ubuntu are you working ? Have you tried to

sudo apt-get remove network-manager

and then

sudo apt-get install network-manager

Can you please type in your terminal

ifconfig

and paste here the output ?

(it's more a comment than an answer, but I don't have enough reputation to add a comment...)

share|improve this answer
    
Wlan0: Link encap:Ethernet HWaddr 00:12:bf:c4:8c:f2 inet6 addr: fe80::212:bfff:fec4:8cf2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:37 errors:0 dropped:0 overruns:0 frame:0 TX packets:112 errors:0 dropped:0 overruns:0 carrier:0 Ubuntu 12.04.04 --- ifconfig collisions:0 txqueuelen:1000 RX bytes:5681 (5.6 KB) TX bytes:26298 (26.2 KB) –  user14466 Apr 25 at 7:31
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