Bug 238603 - No wireless networks detected
Summary: No wireless networks detected
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
Assignee: John W. Linville
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-05-01 19:09 UTC by Adam Huffman
Modified: 2007-11-30 22:12 UTC (History)
2 users (show)

Fixed In Version: 2.6.21-1.3194
Clone Of:
Environment:
Last Closed: 2007-06-02 20:01:49 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
Output of lspci -n (732 bytes, text/plain)
2007-05-02 23:22 UTC, Adam Huffman
no flags Details
Output of /var/log/dmesg (25.97 KB, text/plain)
2007-05-02 23:24 UTC, Adam Huffman
no flags Details
dmesg output (29.56 KB, text/plain)
2007-05-03 21:47 UTC, Adam Huffman
no flags Details
latest dmesg output (33.44 KB, text/plain)
2007-05-21 22:06 UTC, Adam Huffman
no flags Details

Description Adam Huffman 2007-05-01 19:09:45 UTC
Description of problem:

With the latest kernel and wireless-tools no wireless networks are detected and
running 'iwlist scan' causes a segmentation fault.

Version-Release number of selected component (if applicable):

2.6.21-1.3116.fc7

How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:

No wireless networks detected.

Expected results:

My own network (and the other neighbouring networks) should be detected and I
should be able to choose one in NetworkManager.

Additional info:

Comment 1 John W. Linville 2007-05-01 19:54:01 UTC
Gonna need a bit more info.  Let's start with the output of running 'dmesg' 
and 'lspci -n'.

Comment 2 Adam Huffman 2007-05-02 23:22:56 UTC
Created attachment 154001 [details]
Output of lspci -n

Comment 3 Adam Huffman 2007-05-02 23:24:35 UTC
Created attachment 154002 [details]
Output of /var/log/dmesg

Comment 4 Adam Huffman 2007-05-02 23:27:05 UTC
I suppose I ran out of steam on this one.  Let me know what else would be useful.

Comment 5 Adam Huffman 2007-05-02 23:28:09 UTC
It's a Vaio SZ3.  Had pretty good results with the ipw3945 driver when running FC6.

Comment 6 John W. Linville 2007-05-03 14:58:19 UTC
Please try the latest kernels from here:

   http://people.redhat.com/davej/kernels/Fedora/

Do these work better for you?

Comment 7 Adam Huffman 2007-05-03 21:45:03 UTC
Same result, but at least there's more information.  I'm posting the dmesg
output as an attachment.  Looks like trouble with NetworkManager?

Comment 8 Adam Huffman 2007-05-03 21:47:03 UTC
Created attachment 154079 [details]
dmesg output

Comment 9 Adam Huffman 2007-05-03 21:49:34 UTC
That's with davej kernel 3125

Comment 10 Adam Huffman 2007-05-04 19:53:02 UTC
There still seems to be a problem with the latest kernel 3132.  No wireless
networks shown in NM, and a segmentation fault when I run iwlist scan:

iwlist[4096]: segfault at 0000000003636cf0 rip 0000000000401c9a rsp
00007fff5a8cd7b0 error 4

Comment 11 John W. Linville 2007-05-04 20:08:29 UTC
Running 3132 w/ NM right now, seems to work OK here.  I have had the driver 
die and had to 'modprobe -r iwl3945 ; modprobe iwl3945'.  Does that make 
things any better for you?

Can you configure wireless manually?  Does that work?

Comment 12 Adam Huffman 2007-05-04 20:27:24 UTC
I'll try that later on.  One weird thing with this kernel, having tried the
modprobe commands - ksoftirqd is now taking up 99% CPU time.

Comment 13 Adam Huffman 2007-05-05 15:24:38 UTC
Tried it on a different access point this morning and it was the same.  The
driver doesn't seem to be associating with any network.  I won't have the chance
to try any non-WPA networks until Tuesday.

Must admit I'm not quite sure how to configure WPA manually.

Comment 14 Adam Huffman 2007-05-07 19:25:30 UTC
Just tried with the latest davej kernel (3141) and the situation is still the
same:  NM doesn't detect any networks and trying to connect to my access point
manually doesn't work as the driver never associates.  Running 'iwlist scanning'
causes a segmentation fault.

Comment 15 Adam Huffman 2007-05-09 20:00:36 UTC
Ditto with 3144:  no networks detected with NM and manual setting doesn't work
either.

Comment 16 Adam Huffman 2007-05-15 20:35:51 UTC
Same effect with 2.6.21-1.3149.fc7:

iwconfig wlan0
Warning: Driver for device wlan0 has been compiled with version 22
of Wireless Extension, while this program supports up to version 20.
Some things may be broken...

wlan0     IEEE 802.11a  ESSID:""  
          Mode:Managed  Frequency:5.17 GHz  Access Point: Not-Associated   
          Retry min limit:7   RTS thr:off   Fragment thr=2346 B   
          Encryption key:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0


Comment 17 John W. Linville 2007-05-15 20:39:17 UTC
Have you tried using the latest wireless-tools package?

   http://koji.fedoraproject.org/koji/buildinfo?buildID=6573

Does "iwlist wlan0 scan" still segfault?

Comment 18 Adam Huffman 2007-05-15 20:42:41 UTC
Yes, still getting that segfault.  Just about to try that wireless-tools package.

Comment 19 Adam Huffman 2007-05-15 20:46:09 UTC
With that package (wireless-tools-28-3.fc7), "iwlist wlan0 scan" works and, once
I'd restarted the NM service, I could pick my own AP and authenticate to it.

Hurrsh.

Thanks for your persistence with this. 

Comment 20 Adam Huffman 2007-05-15 22:50:09 UTC
Meant to say 'hurrah' there.  However, I was speaking a little too soon.  While
wireless networks are detected now, the connection to my AP only lasts a minute
or so and then the laptop becomes very responsive, to the extent that I've had
to sync and reboot using Alt-SysRq twice now.  I suppose such iwlwifi problems
are probably well covered in other bugs, though.

Comment 21 John W. Linville 2007-05-17 18:35:03 UTC
Please try the lastest firmware (released 5/16/2007):
 
http://www.intellinuxwireless.org/iwlwifi/downloads/iwlwifi-3945-ucode-2.14.3.tgz

Does that work any better for you?

Comment 22 Adam Huffman 2007-05-17 19:36:08 UTC
That does seem better - the connection has been up for a few minutes now, though
I don't have the time to test more thoroughly tonight.

Comment 23 Adam Huffman 2007-05-21 22:06:25 UTC
Created attachment 155132 [details]
latest dmesg output

This is with kernel 2.6.21-1.3167.fc7 and the newer firmware, as requested in
the previous comment.

Comment 24 John W. Linville 2007-06-01 20:29:45 UTC
Is 1.3194 working better for you?  Can this be closed?

Comment 25 Adam Huffman 2007-06-02 20:01:49 UTC
Yes.  Networks are reliably detected now, though the operation of the driver is
still flaky (though I've referred to that in another bug report).


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