[Bug 325426] [NEW] iwlagn driver crashes on reboot/shutdown on Thinkpad T400

[Wirawan Purwanto]

Public bug reported:

Binary package hint: linux-image

System: Xubuntu 8.10, x86-64 generic/desktop
Hardware: Core2 Duo (Lenovo Thinkpad T400, US model 2764-CTO)
Kernel: 2.6.27 (-9, -10, -11)

When rebooting or shutting down, I consistently get the following crash
dump (like kernel oops?) when the shutdown sequence reaches
/etc/rc0.d/S20sendsigs . A series of screenshots is available here
(sorry no plain text since the output is printed seemingly after syslog
or other logging has stopped):

http://www.flickr.com/photos/wirawan0/3239832727/in/set-72157613138397091/

(These bug screenshot photos are for everybody to use; they are intended
to be public domain.)

The first few lines of the crash dump are like this:

iwlagn: Error: response NULL in 'REPLY_ADD_STA'
BUG: unable to handle kernel paging request at ffff8800ffff8880
IP: [<ffffffff80501ea2>] schedule_timeout+0xa2/0xd0
PGD 202063 PUD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in: nls_iso8859_1 nsl_cp437 vfat fat aes_x86_64 aes_generic ecryptfs af_packet i915 drm bridge rfcomm stp bnep scp l2cap bluetooth ppdev acpi_cpufreq cpufreq_ondemand cpufreq_conservative cpufreq_stats freq_table cpufreq_userspace cpufreq_powersave pci_slot sbs sbshc container ipv6 iptable_filter ip_tables x_tables sbp2 parport_pc lp parport loop usb_storage libusual ....

(more modules linked in are not printed here)

Then scrolling below:

Pid: 5611, comm: NetworkManager Not tainted 2.6.27-11-generic #1
...

What's strange is this: I have been in contact with another T400 owner
(UK model) and he also installed xubuntu 8.10 64-bit on his and he did
not have this kind of problem. Does anybody else experience the same
kind of problem?

After the crash above, the reboot/shutdown would not continue. Often I
have to hold the power button to make it turn off.

Some workarounds:
* rmmod iwlagn before rebooting/shutting down -- then there is no such issue
* or, disable the wireless with the hardware button -- then the shutdown/restart went smoothly

Wirawan

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
iwlagn driver crashes on reboot/shutdown on Thinkpad T400
https://bugs.launchpad.net/bugs/325426
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