Red Hat Bugzilla – Bug 202137
WLan works with kernel 2.6.15 but not with 2.6.17
Last modified: 2007-11-30 17:11:40 EST
Description of problem:
I cannot connect properly to a wireless LAN with the 2.6.17 kernel. It works
with the 2.6.15 without any problems, though.
Properly means, that most times the connections fails, I do not get an IP with
dhcp. Very seldom, the connection with 2.6.17 kernels works, but only for some
seconds - after that I cannot ping the router any more although in these cases
I do not get any error message.
The WLan card is a ipw2200 pro. The firmware is installed with the packages
from livna. It also does not work when I get the firmware from the ipw2200
I tried this with several different WLan access points, at least one of them
WEP encrypted, the others not encrypted at all.
The user space program I use is the NetworkManager, but I also tried by hand
with iwconfig. This failed also.
I tested other WLan cards which showed the same problem with kernel 2.6.17.
But these two cards were both driven by ndiswrapper, and I never tested them
with kernel 2.6.15.
Version-Release number of selected component (if applicable):
kernel-188.8.131.524 does not work at all, kernel-2.6.15-1.2054 works. The
ip2200 package has the number ipw2200-firmware-3.0-1.
Take a WLan enabled computer and try to connect to a WLan.
I attach two text files with /var/log/messages outputs:
The first, wlan-working is the output of a session with the 2.6.15 kernel. The
second is an output of a 2.6.17 kernel: it worked in the first moment for some
seconds. After it died away (without any disconnection message!) I reconnected
(in the log mentioned as user switch), but this time it was not even able to
get an IP.
Created attachment 133997 [details]
An example of a working WLan session with kernel 2.6.15
Created attachment 134000 [details]
An example of a non-working WLan session with kernel 2.6.17: first time it dies away, second time it does not connect at all
Please attach the output from running dmesg soon after trying to use the
ipw2200 driver on 2.6.17...thanks!
Created attachment 134160 [details]
As I said, this time it was a WAP secured network where I did not had a valid
A new kernel update has been released (Version: 2.6.18-1.2200.fc5)
based upon a new upstream kernel release.
Please retest against this new kernel, as a large number of patches
go into each upstream release, possibly including changes that
may address this problem.
This bug has been placed in NEEDINFO state.
Due to the large volume of inactive bugs in bugzilla, if this bug is
still in this state in two weeks time, it will be closed.
Should this bug still be relevant after this period, the reporter
can reopen the bug at any time. Any other users on the Cc: list
of this bug can request that the bug be reopened by adding a
comment to the bug.
In the last few updates, some users upgrading from FC4->FC5
have reported that installing a kernel update has left their
systems unbootable. If you have been affected by this problem
please check you only have one version of device-mapper & lvm2
installed. See bug 207474 for further details.
If this bug is a problem preventing you from installing the
release this version is filed against, please see bug 169613.
If this bug has been fixed, but you are now experiencing a different
problem, please file a separate bug for the new problem.
Created attachment 140314 [details]
the dmesg output, produced short after trying to access the WLan
Created attachment 140315 [details]
messages output of a failed wlan access attempt
Do you have the version 3.0 ipw2200 firmware available in /lib/firmware?
If not, please install there it after obtaining it from here:
Does the latest firmware help?
Thanks for the quick answer - unfortunatelly it didn't work. I tested with the
freshrpms package, but also with the original firmware.
Your wireless network doesn't look too complicated (judging from the
NetworkManager messages in the dmesg). Have you tried without using
# service NetworkManager stop
# ifconfig eth1 up
# iwconfig eth1 essid ConnectionPoint
# dhclient eth1
Does that bring-up the device and get an IP address?
Created attachment 144219 [details]
relevant /var/log/messages part
Created attachment 144222 [details]
Manual configuring the device does not work, see the dmesg and the messages
I used the grml live CDs to check if I can still access the WLan with a kernel
2.6.15 - and I was able to verify it:
There were no problems at all with grml 0.6 (kernel 2.6.15) but I was not able
to access the WLan with grml 0.9 (kernel 2.6.18). I can post the dmesg and
messages outputs or test against other grml versions.
That was with manual configuration, grml does not come with NetworkManager.
I would install the kernel 2.6.15 from fc5 but it does not work because of a
hal dependency :/
If I can provide any debug information just post me how to do that, I would
love to provide more information.
Fyi: the problem is still valid in Kernel 2.6.19-1.2895.fc6
Also, I now bought a D-Link WLan router so I can set up any test environment
at any time. Just say what information I should provide, and I will do (if
anything comes to your mind, looks like I'm the only one with that problem).
Today I tried to reproduce the problem with the OpenSuse 10.2 Live DVD - and
there the WLan worked. The Opensuse Live DVD uses a kernel of the 2.6.18 line.
It magically started working - magically, because I have no idea why it
suddenly does so. However, just in case anyone else ever comes into the same
situation, here is what I did:
I tried to set up the wireless connection with wifi-radar. I expected it to
fail (since I've also tried other programs, tools and the command line) and so
did it. The dhcp client was unable to receive a response.
However, in wifi-radar you can also, if you want to, set some values for the
connection, and so I set the right channel (6) - and it worked. It connected
After that I also set the channel in system-config-network to 6 - and suddenly
NetworkManager was able to connect.
But afterwards I also set the channel in system-config-network to other
values, or the mode to managed (where you cannot set any channel at all), and
every configuration I tried worked this time.
So, after all, I have no idea why it suddenly works. And I have no idea why
for example grml struggled to connect to the WLan with the newer kernel.
But I would like to thank everyone who has looked into this and spent time
thinking about it. I myself spent much to many hours on this problem, what a