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For solution see last comment

The problem: I just installed a new router today:

D-Link N300 DIR-636L wireless gigabit router

Ethernet (wire) works fine on Ubuntu 12.04 Desktop as well as Ubuntu 12.04 Laptop.

Wireless works also well for iPad, Android phone and MacBook Pro. Problem is with Ubuntu laptop (HP Pavillion G4).

I have dual install Windows 7 / Ubuntu 12.04 and previously had no wireless problem on either OS with my old Linksys router. But for some reason Ubuntu won't connect with the new D-Link router.

I tried with the Windows OS, punch in the password, works like a charm, but when I restart with Ubuntu, no way I can get anything to happen. Tried with DHCP addresses only, manual, automatic, put in the ip adress of the router and the netmask, whatever, it's like trying to connect to a pint of milk.... Once, for some reason, it did connect to the router although not to the internet, then I made some changes and it was gone. Could I get it back? Hon-Hon...

Anyway, here is what ifconfig gives (while being plugged thru the wire, mind you)

wikipedro@wikipedro-HP:~$ ifconfig  
eth0      Link encap:Ethernet  HWaddr 2c:27:d7:de:b2:76   
          inet addr:192.168.0.104  Bcast:192.168.0.255  Mask:255.255.255.0  
          inet6 addr: fe80::2e27:d7ff:fede:b276/64 Scope:Link  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1  
          RX packets:1979 errors:0 dropped:0 overruns:0 frame:0  
          TX packets:2143 errors:0 dropped:0 overruns:0 carrier:0  
          collisions:0 txqueuelen:1000   
          RX bytes:1055947 (1.0 MB)  TX bytes:716054 (716.0 KB)  
          Interrupt:41 Base address:0xe000   


eth1      Link encap:Ethernet  HWaddr 40:2c:f4:03:3f:7f    
          inet6 addr: fe80::422c:f4ff:fe03:3f7f/64 Scope:Link  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1  
          RX packets:155 errors:3 dropped:0 overruns:0 frame:192815  
          TX packets:208 errors:187 dropped:0 overruns:0 carrier:0  
          collisions:0 txqueuelen:1000   
          RX bytes:40787 (40.7 KB)  TX bytes:53911 (53.9 KB)  
          Interrupt:16  


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:16436  Metric:1  
          RX packets:3821 errors:0 dropped:0 overruns:0 frame:0  
          TX packets:3821 errors:0 dropped:0 overruns:0 carrier:0  
          collisions:0 txqueuelen:0   
          RX bytes:312286 (312.2 KB)  TX bytes:312286 (312.2 KB)

Just so you know, I did read a lot of the posts.

Help would be nice. :)

Here is what seems relevant from lspci -nnv

01:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:1483]
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at c2500000 (64-bit, non-prefetchable) [size=16K]
Capabilities:
Kernel driver in use: wl
Kernel modules: wl, bcma, brcmsmac

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)
Subsystem: Hewlett-Packard Company Device [103c:166d]
Flags: bus master, fast devsel, latency 0, IRQ 41
I/O ports at 3000 [size=256]
Memory at c0404000 (64-bit, prefetchable) [size=4K]
Memory at c0400000 (64-bit, prefetchable) [size=16K]
Capabilities:
Kernel driver in use: r8169
Kernel modules: r8169

03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5116 PCI Express Card Reader [10ec:5209] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:166d]
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at c1500000 (32-bit, non-prefetchable) [size=4K]
Capabilities:
Kernel driver in use: rts_pstor
Kernel modules: rts_pstor

Sorry if I made mistakes with the markdown, this is kind of new for me.

share|improve this question
    
Please show me the relevant info about the wifi adapter from lspci -nnv –  grimpitch Apr 4 '13 at 0:00
    
Here are the last three sections that I think are relevant,Added in the main question (not sure where to paste it) –  WkPedro Apr 4 '13 at 2:33
    
It's fine as you pasted it. :) What is your kernel version? Run uname -r –  grimpitch Apr 4 '13 at 3:44
1  
SOLVED: Problem was the Broadcom driver - BCM4313 802.11b/g/n Used the solution from this link - ubuntuforums.org/showthread.php?t=1997880, and found many instances of similar problem. Thanks for your efforts grimpitch. –  WkPedro Apr 6 '13 at 16:47
1  
It's ok to put an answer to your own question, and then accept it when you can. We also don't usually put solved in the title of questions. –  user76204 Apr 6 '13 at 16:52
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