Bug 451282

Summary: iwl4965 driver causes kernel panic with Intel 4965AGN wireless
Product: [Fedora] Fedora Reporter: Yuta Kitamura <kee>
Component: kernelAssignee: John W. Linville <linville>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: low    
Version: 9CC: bugzilla, fedora, kernel-maint
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 2.6.25.6-57.fc9 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-06-13 20:29:41 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Kernel panic log
none
dmesg information none

Description Yuta Kitamura 2008-06-13 17:45:21 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b5) Gecko/2008043010 Fedora/3.0-0.60.beta5.fc9 Firefox/3.0b5

Description of problem:
I'm using Panasonic CF-Y7 laptop which has Intel Wireless WiFi Link 4965 AGN wireless LAN card.
Since the update of the new Fedora kernel (kernel-2.6.25.6-55.fc9.i686),
the iwl4965 driver causes a kernel panic on wireless network activation (by using NetworkManager) and the system freezes completely.


Version-Release number of selected component (if applicable):
kernel-2.6.25.6-55.fc9.i686

How reproducible:
Always


Steps to Reproduce:
1. Start a wireless network by NetworkManager.


Actual Results:
The system became frozen by a kernel panic.

Expected Results:
The wireless network should have been successfully started.

Additional info:
Before the update of new kernel (i.e. kernel-2.6.25.4-30.fc9.i686 and before),
the wireless LAN worked fine.
Comment 1 Yuta Kitamura 2008-06-13 17:46:46 UTC 
Created attachment 309264 [details]
Kernel panic log

The kernel panic log of this problem.
Comment 2 Yuta Kitamura 2008-06-13 17:48:44 UTC 
Created attachment 309265 [details]
dmesg information

dmesg log of my system.
Comment 3 John W. Linville 2008-06-13 18:19:25 UTC 
Does this happen every time?  Are you able to use the device for any time before
the crash?

Can you replicate the issue with the kernels here?

   http://koji.fedoraproject.org/koji/buildinfo?buildID=52456
Comment 4 Yuta Kitamura 2008-06-13 19:01:51 UTC 
(In reply to comment #3)
> Does this happen every time?  Are you able to use the device for any time before
> the crash?
> 
> Can you replicate the issue with the kernels here?
> 
>    http://koji.fedoraproject.org/koji/buildinfo?buildID=52456

This problem happens every time when I start a wireless network.
The system freezes after a wireless network is established by NetworkManager,
i.e. immediately after two green lamps get turned on.
Without starting a wireless network, the system seems to work fine
(but it will be started automatically when I use the laptop around the wireless
network registered to NetworkManager).

The problem does not seem to happen with the kernel shown above.
(Is this problem already fixed?)
Comment 5 John W. Linville 2008-06-13 20:29:41 UTC 
It seems so...I think we are trying to get a new kernel through the normal
release process quickly.
Comment 6 Martin Ebourne 2008-06-13 20:41:19 UTC 
I'm seeing the same issue on a HP 8510w also using iwl4965. Hard freeze just
after X started, which would correspond to NM bringing the network up.

Started with kernel-2.6.25.6-55.fc9.x86_64 (-30 was fine) and is already fixed
with kernel-2.6.25.6-57.fc9.x86_64.
Comment 7 Todd Savoie 2008-06-13 23:43:27 UTC 
The kernel-2.6.25.6-57.fc9.x86_64 has resolve the same issue on my Compaq F730US
with a BCM94311MCG (b43)