Mint 17 Intel 3945ABG Problem

[KalvinAung]

My laptop is Compaq 510. This is fresh install and everything else is working fine. I can use internet/network via cable. I can use wifi via my mobile phone hotspot. But I cannot connect my home router and office router. All networks are configured with WPA2. No error message or whatsoever, it just did not connect. I tried to set manual ipv4, then it connect but unable to use/ping anything other than self. I was trying to figure out using various websites and so far nothing is working.

I have development and administration experience in Windows platform but totally newbies in linux. I have been testing Mint on VM since 14 and this is my first time decided to run as host OS. It is working as intended, except I can't connect my router via wifi. Please help me.

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* I. scanning WIFI PCI devices...
  -- Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
      ==> PCI ID = 8086:4222 (rev 02)
-------------------------
* II. querying ndiswrapper...
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* III. querying iwconfig...
wlan0     IEEE 802.11abg  ESSID:off/any  
          Mode:Managed  Frequency:2.412 GHz  Access Point: Not-Associated   
          Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          
lo        no wireless extensions.

eth0      no wireless extensions.

-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr 00:26:55:bf:31:e9  
          inet addr:192.168.0.15  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::226:55ff:febf:31e9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:27714 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17457 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:31009820 (31.0 MB)  TX bytes:2520579 (2.5 MB)
          Interrupt:17 

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:65536  Metric:1
          RX packets:2467 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2467 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:170267 (170.2 KB)  TX bytes:170267 (170.2 KB)

wlan0     Link encap:Ethernet  HWaddr 00:1f:3c:e3:26:8c  
          inet6 addr: fe80::21f:3cff:fee3:268c/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:328 (328.0 B)  TX bytes:7507 (7.5 KB)

-------------------------
* V. querying DHCP...
RTNETLINK answers: File exists
-------------------------
* VI. querying nslookup google.com...
Server:		218.186.2.16
Address:	218.186.2.16#53

Non-authoritative answer:
Name:	google.com
Address: 74.125.130.113
Name:	google.com
Address: 74.125.130.138
Name:	google.com
Address: 74.125.130.139
Name:	google.com
Address: 74.125.130.100
Name:	google.com
Address: 74.125.130.101
Name:	google.com
Address: 74.125.130.102

[JeremyB]

Do you know what channels your home and office routers are on?


This will show what limits are on the wifi card

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iw reg get

[KalvinAung]

Do you know what channels your home and office routers are on?

I don't know, how to check ? or what to check ?

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kalvin@kCompaq510 ~ $ iw reg get
country 00:
	(2402 - 2472 @ 40), (3, 20)
	(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
	(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
	(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
	(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS

[JeremyB]

Do you know what channels your home and office routers are on?

I don't know, how to check ? or what to check ?

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kalvin@kCompaq510 ~ $ iw reg get
country 00:
	(2402 - 2472 @ 40), (3, 20)
	(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
	(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
	(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
	(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS

I will do this the quick way then

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sudo apt-get install pastebinit

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wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script

When asked about uploading to pastebin press Y then enter and post the URL that is shown in terminal

[KalvinAung]

Thanks for helping me here is the link

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http://pastebin.com/xJLKzgVc

[JeremyB]

Found a couple things, it appears that access point Calvin is using a mixed mode security still(TKIP and CCMP, TKIP has caused issues in Linux) and power management is enabled on the card but it is easy to disable power management

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sudo iwconfig wlan0 power off

[KalvinAung]

How about now ?

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http://pastebin.com/923CEyxX

[JeremyB]

How about now ?

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http://pastebin.com/923CEyxX

It should work if you unplug the ethernet cable

[KalvinAung]

How about now ?

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http://pastebin.com/923CEyxX

It should work if you unplug the ethernet cable

But it did not connect

But it can still connect to my Nexus5 hot spot .. as always.

[JeremyB]

Time zone indicates Singapore, if that is correct

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sudo iw reg set SG

The frequencies/bandwidth/power output might be different than the default 00 setting and there is more more place to set it

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sudo gedit /etc/default/crda

The last line needs to be

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REGDOMAIN=SG

save and exit program and reboot

What is the current setting on your router for 11 a/b/g/n?

[KalvinAung]

Time zone indicates Singapore, if that is correct

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sudo iw reg set SG

The frequencies/bandwidth/power output might be different than the default 00 setting and there is more more place to set it

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sudo gedit /etc/default/crda

The last line needs to be

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REGDOMAIN=SG

save and exit program and reboot

What is the current setting on your router for 11 a/b/g/n?

Yes, I'm from Singapore. Commands run and value set. (still no connection to wifi router)

Current router config is BGN mixed, 2.4 GHz, Channel 3, WPA/WPA2 Personal, AES with same passcode (unchanged, for the other existing devices.) Every other devices, iPhone, Android Phone, Android Tablet, Windows 8 laptop, current laptop with XP had no issue. I really don't understand why ...

[JeremyB]

Run the script with it connected to the Nexus

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./wireless_script

I had one of these that worked but I use a ZTE hotspot, it is possible that there is something not quite right with the router and that the Intel Linux dev's haven't had one of these routers

It might be worth trying other channels on the router

[KalvinAung]

Run the script with it connected to the Nexus

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./wireless_script

I had one of these that worked but I use a ZTE hotspot, it is possible that there is something not quite right with the router and that the Intel Linux dev's haven't had one of these routers

It might be worth trying other channels on the router

Hi Jeremy, why would I need to run "while connected to Nexus" ?
I mean I can connect my laptop using cable and it's working fine.
I have tried changing several channels on my router too.

The thing is "this computer work almost everything I need" except I can't move my laptop around because I need to connect it to the cable. Because it cannot connect my router via Wi-Fi. Other than this, everything else is working. It is like a few grain of sand in your favorite food.

[JeremyB]

I guess you could try

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echo "nameserver 127.0.1.1" | sudo tee -a /etc/resolv.conf

If nothing else, remove the ethernet cable, attempt to connect to your wifi, wait for it to fail and then run

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cat /var/log/syslog | tail -20

[KalvinAung]

Hi JeremyB

I was out of touch with my computer for several days (baby+new project). I'll get back to mint tomorrow and will try again. Thank you for your help.

[KalvinAung]

Update : Still not connect .. I'm giving up now.

[JeremyB]

Update : Still not connect .. :( I'm giving up now.

It might be time to get a newer wifi card anyhow if yours is easy to replace. I would actually recommend a newer Intel card, something like a 1030- it is a bit older but uses the iwlwifi module. I would advise against the newer 7000 cards and anything with WiMax and they might not be compatible with your computer