Re: [Aironet] system freeze (kernel panic)

[Jim V. <jv...@ci...>]

Red Hat Linux 7.1 out of the box is configured to use the airo4500.o
driver with our pcmcia cards on insertion.

This driver has caused alot of headcaches for our tech support people
since it is a driver we do not support nor recommend.

This driver is known to not function properly with our newer wireless cards
and WILL lock the system up as you describe if the card is ejected.

We recommend RH 7.1 users to use this driver and utilities:
http://www.cisco.com/pcgi-bin/tablebuild.pl/aironet-utils-linux

The archive comes with pre-compiled modules that copy into place w/out
requiring any compiling.

Or you can retrieve the version the driver that ships with the
pcmcia-cs utility package here: http://sourceforge.net/project/showfiles.ph=
p?group_id=3D2405

Or if you upgrade your kernel to a later one, you can use the driver that
is now included with it.

***

If you are using a radio that has the Japan "wideband" channelset, we do
have a known problem recognizing that channelset with our currently released
version of ACU - which has been fixed and should be released in the near fu=
ture.

Jim

On Tue, Oct 16, 2001 at 02:44:46PM +0900, Shingo HORISAWA wrote:
> Hi, all.
>=20
> I'm using aironet 351 PC card on Vine Linux 2.5.1 (kernel 2.2.17)
> and Redhat Linux 7.1 (kernel 2.4).
> But it often freezes (kernel panic).
> Frequency of freeze seems to depend on a kind of machine or distribution.
> Because a system freeze, network does not work.
> (So, I have no choice but to switch off.)
>=20
> I show the messeages was displayed when it freezes in text mode.
>=20
> ---------------------------------------------------------
> (In the case of Redhat Linux 7.1 , IBM ThinkPad A2lp)
> ---------------------------------------------------------
> Unable to handle kernel NULL pointer dereference at virtual address 00000=
016
>  printing eip:
> d18677ac
> pgd entry c14a1000: 0000000000000000
> pmd entry c14a1000: 0000000000000000
> ... pmd not present!
> Oops: 0000
> CPU:    0
> EIP:    0010:[<d18677ac>]
> EFLAGS: 00010097
> eax: 00000004   ebx: c78306b8   ecx: 00000006   edx: cfaf1b40
> esi: 00000016   edi: c78306b8   ebp: c7830540   esp: c026ff14
> ds: 0018   es: 0018   ss: 0018
> Process swapper (pid: 0, stackpage=3Dc026f000)
> Stack: 00000000 00000004 00000000 00000016 cfaf1b40 00000046 00000987
> 000001a7
>        00000001 c7830400 00002710 c011daa8 00000246 00000000 c02ad5a0
> 003c0000
>        c5829da0 24000001 00000003 c026ffa8 c010a30a 00000003 c7830400
> c026ffa8
> Call Trace: [<c011d1a8>] [<c010a30a>] [<c010a488>] [<c0107240>] [<c010724=
0>]
> [<c01090c4>] [<c0107240>]
>        [<c0107240>] [<c0100018>] [<c0107263>] [<c010722e2>] [<c0105000>]
> [<c0100191>]
>=20
> Code: f3 a6 0f 97 c2 c0 38 c2 0f 84 d4 fe ff ff ff 44 24 08
> Kernel panic: Aiee, Killing interrupt handler!
> In interrupt handler -- not syncing
> ------------------------------------------------------
>=20
> Aironet card's firmware version I'm using is V4.25.05.
>=20
> When I use other wireless LAN cards (e.g. MELCO WLI-PCM-L11),
> this phenomenon does not occur.
> Why does this happen ?
>=20
> Regards.
>=20
>=20
> **********************************************************
>    Shingo Horisawa
>=20
>      Researcher
>      Department 1
>=20
>      ATR Adaptive Communications Research Laboratories
>=20
>      2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan
>      TEL +81-774-95-2720   FAX +81-774-95-1509
>      E-MAIL  hor...@at...
> **********************************************************
>=20
> _______________________________________________
> Aironet mailing list  -  Ai...@cs...
> http://csl.cse.ucsc.edu/mailman/listinfo/aironet

--=20
     |          |         Jim Veneskey
    :|:        :|:        Software Test Engineer
   :|||:      :|||:       320 Springside Drive Suite 350, Akron OH 44333
=2E:|||||||:..:|||||||:.    Email: jv...@ci...