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[#5818] wireless semi-broken (dd-wrt_

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2010-05-25 23:01
Submitted By:
Brian Toovey (btoovey)
Assigned To:
Nobody (None)
wireless semi-broken (dd-wrt_

Detailed description
After upgrading from 1.2 leaked to latest power kernel unable to see certain wireless networks.  Able to see some but
not all - specifically my home router linksys wrt400n running dd-wrt latest.  Do not see ssid in network list.  Do not
see any bugs in dmesg.  Able to associate to other networks.  Switched network configuration on dd-wrt to open network
with no encryption and same issue still there.

Any information I can provide?  I am at a loss.



Date: 2012-03-20 16:00
Sender: Pali Rohár

ok, closing as fixed.
Date: 2012-03-20 15:20
Sender: GameboyRMH The Cool Guy

Happy to report that it appears to be fixed in v50! :D
Date: 2011-03-29 15:12
Sender: GameboyRMH The Cool Guy

I don't mean to nag, but...any progress on the patched kernel?
Date: 2011-02-17 13:52
Sender: Tom Tanner

thank you for your input.
After a long absence I'm going to upload a new patched kernel
this weekend.
Date: 2011-02-17 13:42
Sender: David Gnedt

My guess is that the problem doesn't exists in the stock kernel
because it has mesh networking disabled.
I think there are two ways to solve this issue in kernel-power:
a) disable mesh networking in the kernel config (because it isn't
IEEE conform in kernel 2.6.28)
b) backport the commit I mentioned in my previous post
Date: 2011-02-16 18:49
Sender: GameboyRMH The Cool Guy

Just thought I'd point out some interesting related posts on
the Maemo forums:

Here's a report that the bleeding-edge wl1251 drivers used in
conjunction with the power kernel makes DD-WRT APs visible:

And here's a report that the problem doesn't exist with DD-WRT
build 15962:
Date: 2010-12-19 21:03
Sender: David Gnedt

I have experienced a similar issue while experimenting with
compat-wireless and the wireless-testing tree.
I have found that an field sent by DD-WRT is wrongly interpreted
as MESH ID. The garbage MESH ID is then used as SSID. This breaks
Maemo's network manager.

For me the following commit fixes the issue:

I can't really tell if it's the same issue in 2.6.28 kernel.
Nevertheless I can say that the issue shows a little different.
With stock 2.6.28-power46 driver I can see the network with empty
SSID in "iwlist scan", but the network manager only
displays hidden networks.
With compat-wireless before the mentioned commit I can see a
network with two SSIDs (the correct and a garbage SSID)
in "iwlist scan" and only the garbage SSID in the network
With compat-wireless after the mentioned commit, all works as

I hope this will help a little, although there are so much changes
between 2.6.28 and bleeding-edge wireless-testing.

PS: Current Ubuntu kernels are broken in the same way, but it
doesn't affect the user, as Ubuntu's network manager already
uses the new nl80211 configuration interface, whereas Maemo's
network manager uses the plain old wireless extensions.
Date: 2010-11-18 22:41
Sender: GameboyRMH The Cool Guy

Just tested using version 2.6.28-maemo46, this time with a DIR-615
C1 running DD-WRT v24-sp2. I still can't see the router in NG-mixed
mode but I can see it in G-only mode.
Date: 2010-11-17 06:08
Sender: Adam Polkosnik

It must be something about the toolchain, I've rebuilt the kernel
in scratchbox, using the directions provided at, and it had
no problems finding the problematic AP that was not visible with
Date: 2010-09-03 19:59
Sender: GameboyRMH The Cool Guy

I've experienced this exact problem as well. With the stock PR1.2
kernel, I can connect to my WRT160NLs running DD-WRT just fine,
but when running the power kernel (2.6.28-maemo37) I can't see
them at all.
Date: 2010-08-11 02:44
Sender: Adam Polkosnik

I've experienced the same on .37 and prior (not all tested),
and had to revert to PR1.2 to be able to connect to that access
point (hidden SSID). Common theme appears to be 802.11n device
and dd-wrt (recent builds). Interestingly enough, I've had no
problems on wrt54gs (802.11g) running dd-wrt, so it might be
something with handling 20MHz or 40MHz channels.
Date: 2010-06-19 03:45
Sender: Yonathan Dossow

I have this issue too. running PR1.2 stock kernel and linksys
wrt160nl, with dd-wrt, works ok, but, with kernel power v37 my
wireless network dissapears.
Date: 2010-05-26 18:16
Sender: Brian Toovey

I was running leaked 1.2 and it was working ok.  I tried your
experimental kernal compiled yesterday so far v37-38

Date: 2010-05-26 10:08
Sender: Tom Tanner

thanks for the report.
which version (PR and kernel) are you running?
does it work with PR1.2 and the Nokia kernel?

Attached Files:

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Field Old Value Date By
ResolutionAwaiting Response2012-03-20 16:00pali
close_date2012-03-20 16:002012-03-20 16:00pali
status_idOpen2012-03-20 16:00pali

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