monitor mode wireless interfaces incorrect channel -1

I also get this same issue. I believe its an issue with compat-wireless, or with the kernel 2.6.35 itself. Not sure, but I believe there is a patch to fix this, it is the maxim -1 patch. I will link the patch in my post. However I can not confirm if this fixes the issue because I have no idea how to compile a kernel with this patch. Also if this patch does fix the issue,

Not sure but this is the only solution ive found for it. I don't know if it works because I have no idea how to compile a kernel with it or what to do with it. If you can figure this out, please turn this into a simple solution for us users that don't compile kernels.

thank you needlez
the idea of compilling my kernel is scaring me! i am not sure i am enough brave to do this.However i confirm that the bug comes from the kernel and not from compat-wireless,because i installed linux-image.2.6.34(lucid) and the problem was solved.

ok, also confirmed this because i compiled compat-wireless from source and still get the same issue. However i am not able to downgrade my linux-image because at the current moment 2.6.35(maverick) is the only one that supports the laptop im running. Strange because i thought 10.04 would fix the issue with the i7 laptops and nvidia cards. So as of now im stuck until this issue is resolved.

Same problem
who have simple solution?

Compare with Bug #602609

blue dream, my (simple) solution is to install linux-image-2.6.32 besides 2.6.35.
You need to download the kernel from here :
http://packages.ubuntu.com/lucid-updates/linux-image-2.6.32-25-generic
sudo dpkg --install linux-image-2.6.32-25-generic_*.deb
sudo update-grub

From this point, In the grub you 'll have the possibility to boot on linux-image-2.6.32 and then aircrack will work ,except if your'r in the same case than needlez6 !

ok, so im sorry to post this fix so late but i finally found a way to fix this.

wget http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2010-10-16.tar.bz2
tar -jxf compat-wireless-2010-10-16.tar.bz2
cd compat-wireless-2010-10-16
wget http://patches.aircrack-ng.org/mac80211.compat08082009.wl_frag+ack_v1.patch
patch -p1 < mac80211.compat08082009.wl_frag+ack_v1.patch
wget http://patches.aircrack-ng.org/channel-negative-one-maxim.patch
patch ./net/wireless/chan.c channel-negative-one-maxim.patch
gedit scripts/update-initramfs
#*** FIND LINE 13: KLIB=/lib/modules/2.6.31-wl/build
#*** REPLACE WITH: KLIB=/lib/modules/$(uname -r)/build
make
sudo make install
sudo make unload
sudo reboot

This will fix the issue with the negative channel and aircrack-ng. I confirmed this today, it was compat-wireless not just the kernel. Also not sure but I think WPA handshakes are messed up too. But I know this will work to break WEP. And this does work to fix. Thanks to squirrelscript and ubuntuforums and iwir3d.

hello.

I have a card with a broadcom chip and working with b43 driver.

so this patch work with b43?
this change b43 for compat-wireless?

so... thanks for your help.

greetings jo.

intel3945abg wifi card works fine

if you have the channel -1 error this will fix it regardless of what wifi card you use.

OK, it works, in this difficult card:

Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315]

(some people will know about I'm talking)

Thank you very much!

New patch works with Atheros ATH9k and with Alfa RTL8187L when using bash. But ... when using WepCrackGui you can't see replies, no IVS capture. Strange.

needlez6, where is this fix committed? A Ubuntu package, compat-wireless upstream, a natty package, etc?

sorry its not commited yet, I was going to compile this fix as a package, didn't realize, changing status now, just to fixed, or patched... sorry, also if you update your kernel to 2.6.35-23 this issue will come back and you will have to redo the entire process. Wish there was a better way to fix this.

And @Guy: Not sure about WepCrackGui, but I have no issues with Wep crack-ng from the terminal. Are you using -w option and saving it?? Other then that not sure. Try doing it from terminal.

sudo airmon-ng start (dev) (ch)
sudo airodump-ng -c (ch) -w (psk) <mon0>
sudo aireplay-ng --fakeauth 0 -e "ESSID" -b BSSID -h STATION <mon0>
sudo aireplay-ng --arpreplay -b BSSID -h STATION <mon0>

try using that and see if you can get your IVs. And to anyone can they confirm if WPA is messed up or not?? I'm testing but my router is two channels N+G so not sure if I can even do WPA with a G card. Laterz

Does not work with iwlagn

The first time I tried using WepCrackGui was after the update from Lucid to Maverick. Then it didn't worked as expected. After reinstalling Maverick from scratch and applying your patch, all work. Even WPA. I'm on 2.6.35-22. Tried with the Alfa RTL8187L. It is just a pitty that after each kernelupdate we will have to fix it again.

Forgot to say: first I was using Aircrack-ng that was released with Maverick. Now I installed svn r1788.

The problem still exists on Maverick 2.6.35-23-generic, but applying needlez6's fix worked. I'm running an Atheros AR5212, x86, Ubuntu 10.10 desktop on a Lenovo Thinkpad T60 laptop. Aircrack works successfully now.

Any idea of when this will be packaged? It would be nice not to have to apply a custom fix ;)

I just installed the patch following the directions outlined above and it solved the problem perfectly however a side effect has appeared. That is, whenever I'm connected to a network for about two minutes, Maverick freezes completely. I installed the patch last night and the freezing has continued to happen every time i reboot since then. I'm running 10.10 on an eee pc 1005ha.

Thanks for the great work so far!

I believe that the issue I am having is the same one described in http://ubuntuforums.org/showthread.php?p=10159157, except that I am running 10.10.

I think that this has nothing to do with the compat-wireless.
After installing Maverick I had those crashes too.
How I solved it:
- go to http://kernel.ubuntu.com/~kernel-ppa/mainline/ and install 2.6.37-rc5-natty.
- get http://www.orbit-lab.org/kernel/compat-wireless-2.6-stable/v2.6.37/compat-wireless-2.6.37-rc5-2.tar.bz2
- then follow the instructions of Needlez6.
- In startup-manager (grub) change to 640 x 480, no splash.
- reboot

May be you can try just the grub-trick on 2.6.35. I didn't try it.

Guy

I'll give this a try! However, I've been running Maverick since October and had the first crash five minutes after following Needlez6's instructions, so I'm almost certain that this is a result of the patching process. I'll post back early this week! Thanks for the suggestion, Guy.

Lucas

same problem,i'm locked on channel -1 (ath9k driver, ubuntu 10.10, dist-upgrade is done, no fix yet )

I'm having the same issue as Lucas Serven and I also think that is a side effect of the fix. Once I removed the patched version, the problem disappeared.

I downloaded the most recent tarball of compat-wireless (01/30/2011) and followed Squirrelscript instructions. Solved the freezing problem.
http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2011-01-30.tar.bz2

I tried the fix that Guy suggested in December but I continued to have the same problems with the erratic panics as a side effect of the patch. However, the compat-wireless package that IMBECIL suggested fixed the channel lock problem and the freezing problem, so now my machine works great. Thanks, IMBECIL.

I have the same problem that has LUCAS SERVEN. How do I use the compat-wireless package that has posted Imbecil?

Hello I thank you all for the help with this channel problem. I have followed the patching directions and everything seemed to go fine until I try and load my b43 drivers I get an error "Error inserting b43 Invalid argument" I am currently downloading an older kernel version to see if that fixes is and I will let you know if that fixes it but I would like to find a way to fix this with the current kernel version. If anyone knows a way please let me know.

UPDATE: Kernel 2.6.32-25-generic does indeed not have the -1 channel problem. I am able to use aireplay and inject packets correctly.

I would still like to find a solution for the current kernel version though so if someone knows how to fix the b43 channel -1 problem please post.

lspci shows:
Network controller: Broadcom Corporation BCM4312 802.11a/b/g (rev 02)

Here is the best solution:

http://ubuntuforums.org/showthread.php?t=1598930&page=13

"Hi, I have a better solution for everyone trying to use this patch that isn't able to get it working. You should go and download the svn package from aircrack-ng. first download the package for svn by running this in terminal.
svn co http://trac.aircrack-ng.org/svn/trunk/ aircrack-ng
then browse to that folder with cd and sudo make && make install"

Natty's kernel 2.6.38-8-generic is affected by this bug too.
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

The kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.39.1-oneiric/ shows the same behaviour.
This used to work in Ubuntu 10.04 (Lucid) so it's definitely a regression in the Linux kernel in Ubuntu.
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

I can confirm that this bug has begun to affect me again in Natty. The patch provided for the bug in Maverick now only results in freezing my system.

I'm working on a PPA to fixe that, by patching cw-backport. Stay tuned !

Any update?
So far the only workaround that works is using Lucid's 2.6.32 kernel.

Installing any of the linux-backports-modules-compat-wireless-* packages didn't help.

This is not a bug in aircrack, only in the Linux kernel.

I fixed that easily (i'm in Oneiric)

Get package source of linux-backports-modules-cw-3.1-3.0.0-14-*, from:

http://archive.ubuntu.com/ubuntu/pool/main/l/linux-backports-modules-3.0.0/linux-backports-modules-3.0.0_3.0.0-14.6.tar.gz

Extract it, and patch updates/cw-3.1/net/wireless/chan.c

with:

http://patches.aircrack-ng.org/channel-negative-one-maxim.patch

well, I did not used patch in my case, I update the code manually... it might work with patch

then build new packages with dpkg-buildpackage

the result is (in my case):

../linux-backports-modules-cw-3.1-3.0.0-14-generic_3.0.0-14.6_amd64.deb
../linux-backports-modules-cw-3.1-3.0.0-14-server_3.0.0-14.6_amd64.deb
../linux-backports-modules-net-3.0.0-14-generic_3.0.0-14.6_amd64.deb
../linux-backports-modules-net-3.0.0-14-server_3.0.0-14.6_amd64.deb
../linux-headers-lbm-3.0.0-14-generic_3.0.0-14.6_amd64.deb
../linux-headers-lbm-3.0.0-14-server_3.0.0-14.6_amd64.deb
../updates-modules-3.0.0-14-generic-di_3.0.0-14.6_amd64.udeb

I installed the package that match my kernel, rebooted and voila!

I wonder if this bug might be fixed in 3.2 or maybe in kernel 3.3?

Does anyone know if this bug was ever tracked or fixed in the upstream kernel?

---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

This bug is tracked in Aircrack-NG project:
http://trac.aircrack-ng.org/ticket/742
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

Some upstream discussions:
http://marc.info/?l=linux-wireless&m=127306591003201&w=4
http://marc.info/?t=127306598700001&r=1&w=4
http://marc.info/?t=127476414900004&r=1&w=4
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

Here is chan.c from kernel 3.2.1 and it's unlikely that it had been fixed:

http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=blob;f=net/wireless/chan.c;h=2fcfe0993ca221cb20e0739d4c1774fa22593cbd;hb=HEAD

rais, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available? It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please do not test the kernel in the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. As well, please comment on which kernel version specifically you tested.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream', and comment as to why specifically you were unable to test it.

Please let us know your results. Thanks in advance.

Helpful Bug Reporting Links:
https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette
https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported
https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug
https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug

@Christopher

This is still an issue for me on Ubuntu 12.04. I have tried running `apport-collect -p linux 643788` but I have received an information that

You are not the reporter or subscriber of this problem report, or the report is a duplicate or already closed.

Please create a new report using "apport-bug".

Patryk, regarding your comments https://bugs.launchpad.net/ubuntu/+source/linux/+bug/643788/comments/49 :
"This is still an issue for me on Ubuntu 12.04. I have tried running `apport-collect -p linux 643788` but I have received an information that

You are not the reporter or subscriber of this problem report, or the report is a duplicate or already closed.

Please create a new report using "apport-bug"."

This is as designed.

However, could you please file a new report by executing the following in a terminal:
ubuntu-bug linux

For more on this, please see the Ubuntu Bug Control and Ubuntu Bug Squad article:
https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue

and Ubuntu Community article:
https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette

When opening up the new report, please feel free to subscribe me to it. Thank you for your understanding.

Helpful Bug Reporting Links:
https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported
https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug
https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug

I also get this same issue, iam using ubuntu 13.04 kernel version 3.8.0-26-generic
how to fix this
can anyone suggest me any patch or anythingelse

akrit, if you have a bug in Ubuntu, the Ubuntu Kernel team, Ubuntu Bug Control team, and Ubuntu Bug Squad would like you to please file a new report by executing the following in a terminal:
ubuntu-bug linux

For more on this, please see the Ubuntu Kernel team article:
https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports

the Ubuntu Bug Control team and Ubuntu Bug Squad team article:
https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue

and Ubuntu Community article:
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Please note, not filing a new report would delay your problem being addressed as quickly as possible.

Thank you for your understanding.