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Standard User mrdigital03
(newbie) Mon 24-Dec-12 14:13:56
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Broadcom wireless driver detects other routers except mine.


[link to this post]
 
I am writing regarding the Broadcom 4227 wireless receiver that I have on my Acer 5755G laptop.

I have recently tried installing Lubuntu 12.10 but the wireless was not working. So I installed the pre-compliled driver that ubuntu provided. It started working after that but it does not detect my router for some reason (I can still detect neighbouring wireless networks). On windows 7, I am perfectly able to connect my router with this laptop.

To resolve this problem, I have installed both the drivers that are available: 1. STA (Broadcom proprietary) 2. Open source driver but both have not been successful in detecting the router. (But wireless does work!)

For installing and diagnosing the STA driver, I have followed the information provided at ( http://www.broadcom.com/support/802.11/linux_sta.php ) even that did not help.

I cannot give much information on the router as I do not have admin access to the router settings. Additionally, I don't know if this would be useful; In order to update my repositories, I did manage to connect to this router via my android phone via tethering. Thinking this might be affecting somehow, I have even tried deleting the settings of this wired connection but even that did not prove any useful.

Any help on this matter would be much appreciated.
Standard User Uilebheist
(legend) Mon 24-Dec-12 14:40:09
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Well, it may be useful to know where in the process it stops working.
In a terminal try typing the following two commands:

sudo iwconfig wlan0
sudo ifconfig wlan0

The first one should show the router's SSID and MAC address - if it says "not associated" then it didn't even get that far.
If it associates the second line will tell you whether it managed to get and IP address via DHCP.

What router model is it (in case it makes any difference).

For example, I have

iwconfig wlan0:
wlan0     IEEE 802.11bgn  ESSID:"not telling"  
          Mode:Managed  Frequency:2.472 GHz  Access Point: 00:xx:xx:xx:xx:xx:xx
...
ifconfig wlan0:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.xxx.xxx  netmask 255.255.255.0  broadcast 192.168.xxx.255

But with the wireless off:
iwconfig wlan0:
wlan0     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Frequency:2.472 GHz  Access Point: Not-Associated   
...
ifconfig wlan0:
wlan0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 00:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
Standard User mrdigital03
(newbie) Mon 24-Dec-12 16:02:48
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
IWCONFIG AND IFCONFIG do not display much as the card is not connected to the router.

it does not show any ESSID or any other related info as they are not connected.

I dont know if this helps, but my wireless card has strangely associated itself with eth1 instead of wlan0


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Standard User Uilebheist
(legend) Mon 24-Dec-12 16:47:32
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Well, the actual name may be changed by udev rules - I suppose ubuntu decided to rename all the wlan to eth for whatever reason. Doesn't necessarily mean anything.
I assume you re-entered any password just to rule out typos etc.
The other thing to do is to check the output of the "dmesg" command to see if there's any error message mentioning wlan0, eth1 or broadcom.
Standard User yarwell
(sensei) Mon 24-Dec-12 16:48:06
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
what channel is the access point on ? your phone should say in settings, or install a WiFi analyzer app.

I ask because some wireless setups can't see above channel 11 as they're set up for the USofA, so an AP on ch13 becomes invisible

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User Uilebheist
(legend) Mon 24-Dec-12 17:02:45
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
Good point - although Ubuntu should have loaded the appropriate regulatory data once it has determined the locality - I use different distros, but they are all able to use channels > 11 (and we know the adapter itself can do it as the wireless works in Windows).
It may be useful to see if the ESSID appears in the list of networks at all - I'm sure the Ubuntu network manager has a way to display that, otherwise the command "sudo iwlist eth1 scan" will show this information, including channel used etc for all networks it detects.
Standard User mrdigital03
(newbie) Mon 24-Dec-12 17:57:22
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
output of IWCONFIG:

[email protected]:~$ iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

eth1 IEEE 802.11 Access Point: Not-Associated
Link Quality:5 Signal level:0 Noise level:213
Rx invalid nwid:0 invalid crypt:0 invalid misc:0

usb0 no wireless extensions.
----------------------------------------------------------------------
*note: USB0 is the tethered connection to my android phone
--------------------------------------------------------------------------

output of IFCONFIG:

eth0 Link encap:Ethernet HWaddr dc:0e:a1:12:57:e0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:16

eth1 Link encap:Ethernet HWaddr 60:d8:19:16:da:81
inet6 addr: fe80::62d8:19ff:fe16:da81/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
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:16436 Metric:1
RX packets:673 errors:0 dropped:0 overruns:0 frame:0
TX packets:673 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:56453 (56.4 KB) TX bytes:56453 (56.4 KB)

usb0 Link encap:Ethernet HWaddr a6:f6:d7:d9:a3:14
inet addr:192.168.42.197 Bcast:192.168.42.255 Mask:255.255.255.0
inet6 addr: fe80::a4f6:d7ff:fed9:a314/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7971 errors:0 dropped:0 overruns:0 frame:0
TX packets:5786 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9431597 (9.4 MB) TX bytes:1203010 (1.2 MB)
Standard User mrdigital03
(newbie) Mon 24-Dec-12 18:01:16
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
Output of DMESG:

http://pastebin.com/M6uQtH0v
Standard User mrdigital03
(newbie) Mon 24-Dec-12 18:06:45
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
Channel 13 2472MHz

Even I had thought of this before but 2.4GHz is a very common spectrum being used for a very long time. So it should not be a problem. I would have probably considered this if it was above 5GHz range.

Also if the channel is reduced to a lower level, it results in wireless drop out issues on the other devices.

Surely this is more to do with on the driver side rather than router side
Standard User Uilebheist
(legend) Mon 24-Dec-12 18:09:38
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Looking at dmesg, you are using the "world" regulatory domain i.e. only frequencies which are legal to use everywhere. So as yarwell suggests it may well be that you can't see the router because it is using a channel higher than 11.
I have no idea how to change that in the Ubuntu network manager or whatever, but you can try the following command:
sudo iw reg set GB
if wireless starts working after that, you just have to figure out how to make it permanent i.e. not be cleared on reboot.

edit - I see you posted while I was typing and you are using channel 13, which would be invisible given the settings.

Edited by Uilebheist (Mon 24-Dec-12 18:10:45)

Standard User mrdigital03
(newbie) Mon 24-Dec-12 18:12:41
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
As the wireless is working it does display the available networks in the UBUNTU NETWORK MANAGER except for my router.

Also I have already tried using sudo iwlist eth1 scan ; it is the same thing all over again, displays all the networks except mine.

I have tried almost everything; I have run out of ways to think what might be wrong frown
Standard User Uilebheist
(legend) Mon 24-Dec-12 18:15:23
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Yes, that would actually match the information from dmesg. See my other reply.
Standard User mrdigital03
(newbie) Mon 24-Dec-12 18:16:51
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
OUTPUT OF sudo iw reg set GB:

sudo: iw: command not found

what do you mean by INVISIBLE? my router is not in HIDE ESSID MODE

Also I can see my router in windows 7 and on my android phone
Standard User Uilebheist
(legend) Mon 24-Dec-12 18:18:57
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Sorry, I mean invisible in the sense that it is on a channel which cannot be accessed due to regulatory restrictions.
Will check on a Ubuntu install I can access to see where to find the iw command or equivalent... will get back with more information as soon as I have it.
Standard User mrdigital03
(newbie) Mon 24-Dec-12 18:20:02
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
Thanks smile
Standard User Uilebheist
(legend) Mon 24-Dec-12 18:29:05
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
OK, the thing I can ssh to is Ubuntu 12.04 not 12.10 so this may or may not work the same... however I'd expect this to be the same.

First make sure you've installed the "iw" and "crda" packages - otherwise you may not be able to set the regulatory domain correctly. Then you can try "sudo iw reg set GB" and try listing the wrreless networks again.

To make the change permanent, edit the file /etc/default/crda and it has a line:

REGDOMAIN=

Change that to

REGDOMAIN=GB

As I said, hopefully this is the same in 12.10 but if not let us know and I'll dig further.
Standard User mrdigital03
(newbie) Mon 24-Dec-12 19:44:21
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
In reply to a post by Uilebheist:
OK, the thing I can ssh to is Ubuntu 12.04 not 12.10 so this may or may not work the same... however I'd expect this to be the same.

First make sure you've installed the "iw" and "crda" packages - otherwise you may not be able to set the regulatory domain correctly. Then you can try "sudo iw reg set GB" and try listing the wrreless networks again.

To make the change permanent, edit the file /etc/default/crda and it has a line:

REGDOMAIN=

Change that to

REGDOMAIN=GB

As I said, hopefully this is the same in 12.10 but if not let us know and I'll dig further.


ok, so I have installed the IW and CRDA packages and now the command sudo iw reg set GB works.

Then tried to re-list the wireless networks, but STILL DOES NOT WORK!!

changed the CRDA file entry to GB like you said, re-listed the network again; STILL DOES NOT WORK.

I thought maybe to kick start I might need to restart the OS so did that, STILL DOES NOT WORK.
Standard User Uilebheist
(legend) Mon 24-Dec-12 19:51:44
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Then I think I am running out of ideas...
I'll be away from the forum tomorrow (something else planned smile) but if I think of something else I'll post back later in the week.
Standard User mrdigital03
(newbie) Mon 24-Dec-12 20:05:32
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
In reply to a post by Uilebheist:
Then I think I am running out of ideas...
I'll be away from the forum tomorrow (something else planned smile) but if I think of something else I'll post back later in the week.


Thanks smile
Standard User ukhardy07
(fountain of knowledge) Mon 24-Dec-12 20:58:52
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Use channel 1, 6 or 11.

Plenty of computers sold in the UK even on windows can't find channels 12 and 13

I pretty much guarantee this is the problem.
You say other channels cause drop outs. I highly disbelieve that. Most routers use 1 6 or 11. This avoids overlapping channels.

So if 6 causes drop outs chances are 11 does not.

Also by using 13 you are interfering with routers on channel 11 due to overlapping channels.
So being on 13 you are still getting interference from routers on channel 11

You'd be better on 11 than 13 if there are devices using 11. Why?

When two routers are on the same channel they work together.
Eg router 1 transfers data, router 2 holds off for a micro second before transmitting.
This means that routers 1 and 2 don't collide with each other wirelessly.

On channel 13 with your router and channel 11 on another router...
Router 1 (ch 13) can't see router 2 (ch11)
Router 1 and 2 both transmit data wirelessly at the same time pretending each other don't exist
Net result is collisions in the air which means the data has to be sent over and over and over and over before it finally gets to you
Net result = performance degradation compared to sharing the wifi channel where both can work together.

On the same channel they wait for each other avoiding collisions completely. This dramatically reduces the need to constantly retransmit data. It's better.

The IDEAL solution is to have 1,6 or 11 with no other router on. So it's all yours.

Lesson use 1 6 or 11.

Edited by ukhardy07 (Mon 24-Dec-12 21:02:00)

Standard User yarwell
(sensei) Wed 26-Dec-12 14:19:06
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Surely this is more to do with on the driver side rather than router side
So does it work on Channel 11 or lower ?

If the driver has a binary blob that doesn't extend beyond channel 11 it will indeed be the fault of the driver, but it's in your hands to change the channel on the router.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User mrdigital03
(newbie) Thu 27-Dec-12 09:44:19
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
I dont have admin access to the router settings. So would not be able to try that out frown
Standard User mrdigital03
(newbie) Thu 27-Dec-12 09:45:17
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Re: Broadcom wireless driver detects other routers except mi


[re: ukhardy07] [link to this post]
 
Don't have router admin access to test this theory.
Standard User Uilebheist
(legend) Thu 27-Dec-12 10:31:51
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Just one more thing - in the OP you mention two different drivers, have you tried both after changing the regulatory domain to GB (with "iw reg set GB") ?
Just in case one can do it and the other cannot.
Standard User mrdigital03
(newbie) Thu 27-Dec-12 17:01:59
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
In reply to a post by Uilebheist:
Just one more thing - in the OP you mention two different drivers, have you tried both after changing the regulatory domain to GB (with "iw reg set GB") ?
Just in case one can do it and the other cannot.


Yes I did that but still did not work frown
Standard User yarwell
(sensei) Thu 27-Dec-12 19:03:08
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
In reply to a post by mrdigital03:
I dont have admin access to the router settings. So would not be able to try that out frown


Aha. I got confused by "Also if the channel is reduced to a lower level, it results in wireless drop out issues on the other devices.".

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User Uilebheist
(legend) Thu 27-Dec-12 19:18:08
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Can you check the output of the "dmesg" command again (or post it) to see if the regulatory domain has changed correctly? You should see something like:
cfg80211: Regulatory domain changed to country: GB

If not, it's back to try to think why it isn't set correctly...
Standard User mrdigital03
(newbie) Thu 27-Dec-12 22:04:34
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
In reply to a post by yarwell:
In reply to a post by mrdigital03:
I dont have admin access to the router settings. So would not be able to try that out frown


Aha. I got confused by "Also if the channel is reduced to a lower level, it results in wireless drop out issues on the other devices.".


Sorry about that, I should have explained; Basically a few months ago the admin had changed the channel to one of the lower ones and there were drop out issues (maybe due to the fact of similar freq.shared by other neighboring routers) So they don't want to change the channels again.
Standard User mrdigital03
(newbie) Thu 27-Dec-12 22:13:59
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
In reply to a post by Uilebheist:
Can you check the output of the "dmesg" command again (or post it) to see if the regulatory domain has changed correctly? You should see something like:
cfg80211: Regulatory domain changed to country: GB

If not, it's back to try to think why it isn't set correctly...


output of "sudo dmesg | grep cfg80211":

[ 137.760006] cfg80211: Calling CRDA to update world regulatory domain
[ 137.795136] cfg80211: World regulatory domain updated:
[ 137.795145] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 137.795151] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 137.795156] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 137.795160] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 137.795165] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 137.795169] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 839.717684] cfg80211: Calling CRDA for country: GB
[ 839.721487] cfg80211: Regulatory domain changed to country: GB
[ 839.721490] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 839.721492] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[ 839.721493] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[ 839.721494] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[ 839.721495] cfg80211: (5490000 KHz - 5710000 KHz @ 40000 KHz), (N/A, 2700 mBm)
Standard User Uilebheist
(legend) Thu 27-Dec-12 22:30:11
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Hmmm, that looks all correct.
Which leaves the drivers, both of them, not being able to use channel 13.
Or else something none of us has thought of yet.

edit - this seems to confirm that both drivers aren't able to see channels 12 and 13: http://ubuntuforums.org/archive/index.php/t-2087718....

Edited by Uilebheist (Thu 27-Dec-12 22:51:11)

Standard User ukhardy07
(fountain of knowledge) Fri 28-Dec-12 00:06:22
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
You are mistaken about 13 being better.
Here's an example...
If a neighbour is using 6 and another using 11.
If you then use channel 8, this is wose than you using 6 or 11.

Why? Because you are bang in the middle of interference from BOTH 6 and 11.

If you use 6 or 11 your router will be on the same channel as a neighbours yes.
BUT it will try not to transmit data at the same time as the neighbours, so you avoid wireless collisions and data needing to be sent over and over...

On channel 8 you are invisible to 6 and 11's routers. You get interference from both and your data collides with theirs mid-air. It's overall going to degrade their network performance AND yours.

SIMILARY

Using channel 13. You get interference from 11. You get collisions mid air. It's worse than actually sharing the same channel...

Hence why we don't see channel 1,2,3,4,5,6,7 etc all being used.
It's done methodically to avoid interference.

1 6 or 11 will work for you.

If 1 is dropping out use 6 or 11 etc.

Channel 1 doesn't overlap with 6. So if the issues are on channel 6 they wont be on channel 1.

The admin may have used say channel 3 or 8 like in the example above. This would cause more issues and possibly drop outs. Afterall they're using 13 which is bad practice.

Edited by ukhardy07 (Fri 28-Dec-12 00:08:39)

Standard User Uilebheist
(legend) Fri 28-Dec-12 07:05:08
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Re: Broadcom wireless driver detects other routers except mi


[re: ukhardy07] [link to this post]
 
That assumes that other routers in the area are set up correctly...
I was visiting some friends over Christmas and they had constant wireless drop outs, they tried 1, 6, and 11 and they were all bad. A quick scan revealed a home hub somewhere in the vicinity broadcasting on channel 8 with the power of a small radio station. Well, that explains problems on both 6 and 11... Then there was something else causing problems to both 1 and 6.
They switched to 13, and had no problems.
Standard User yarwell
(sensei) Fri 28-Dec-12 09:10:38
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
the modern trend of setting routers to auto-select channels looks to be putting a lot of them onto 4, 8 and similar channels. It would have been nice if the auto selection was from 1,5,9 and 13 or 1,6 and 11 not "any old channel" - more dumbing down.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User yarwell
(sensei) Fri 28-Dec-12 09:20:50
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
[ 137.760006] cfg80211: Calling CRDA to update world regulatory domain
[ 137.795136] cfg80211: World regulatory domain updated:
[ 137.795145] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 137.795151] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 137.795156] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 137.795160] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 137.795165] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 137.795169] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 839.717684] cfg80211: Calling CRDA for country: GB
[ 839.721487] cfg80211: Regulatory domain changed to country: GB
[ 839.721490] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 839.721492] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)


The world list does include the GB frequencies, albeit with a different channel width. "World" also includes Ch14 for the Japs.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User ukhardy07
(fountain of knowledge) Fri 28-Dec-12 16:41:54
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
In reply to a post by yarwell:
the modern trend of setting routers to auto-select channels looks to be putting a lot of them onto 4, 8 and similar channels. It would have been nice if the auto selection was from 1,5,9 and 13 or 1,6 and 11 not "any old channel" - more dumbing down.


The auto selection usually chooses 1, 6 or 11 unless there's already devices using other channels.

For instance if somethings using channel 2 then auto is unlikely to use 1 or 6, it might then choose channel 8. The something on channel 2 can even be a doorbell or AV sender nowadays...

Auto generally chooses 1 6 or 11 though.
Standard User ukhardy07
(fountain of knowledge) Fri 28-Dec-12 16:47:55
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
Yes if something is using say channel 8 it causes major issues.

It causes problems on channels 6 and 11.
& channel 1 is prone to issues too. This is because doorbells, av senders, baby monitors etc generally use lower channels. These aren't friendly like routers are. Having a router and a doorbell on the same channel is far more likely to cause issues than having 3 routers on the same channel...So channel 1 can be quite problematic in many situations.

Having several routers on the same channel is generally fine. It's the other devices that cause the major problems..

Often channel 1 appears free as there's no routers using it but it's crammed full of other devices such as these AV receivers & cordless landlines.

Hence why many routers on AUTO channel mode select channel 6 or 11 even when 1 appears free. The routers detecting the interference on channel 1 from e.g the doorbell and moving on.

Using channel 8 causes problems on 6 and 11. Then often channel 1 is already problematic due to the cordless phones etc. In this case the whole frequency is difficult to use.
Standard User yarwell
(sensei) Fri 28-Dec-12 17:01:34
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Re: Broadcom wireless driver detects other routers except mi


[re: ukhardy07] [link to this post]
 
UK cordless phones are generally DECT and well below the frequency of WiFi - below 2 GHz from memory.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User ukhardy07
(fountain of knowledge) Fri 28-Dec-12 18:19:48
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Re: Broadcom wireless driver detects other routers except mi


[re: yarwell] [link to this post]
 
This is true. If placed close to the router they can still impact though.
Much like the vodafone sure signal can.
Standard User mrdigital03
(newbie) Wed 02-Jan-13 23:10:19
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Re: Broadcom wireless driver detects other routers except mi


[re: Uilebheist] [link to this post]
 
UPDATE: I finally got it working. It was infact to do with the router using channel 13. (which many of you did suggest)

Stumbled across some interesting facts though; 1. Besides changing the regulatory settings (to JAPAN, as suggested before) you can still change just the channel manually using IWCONFIG and IW (you can find more info on their dev. sites)

Also after doing tedious research realised that the manufacturer (Broadcom) actually locked CHANNEL 12-13. So I could not switch to it using IWCONFIG or IW. Anyways in the end manage to convince my router admin to drop the channel to 11 which resolved the issue.

Thanks for your help guys!
Standard User Uilebheist
(legend) Thu 03-Jan-13 08:21:34
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Re: Broadcom wireless driver detects other routers except mi


[re: mrdigital03] [link to this post]
 
Thanks for coming back and letting us know.
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