Red Hat Bugzilla – Bug 125486
airo MPI350 stopped working
Last modified: 2007-11-30 17:10:44 EST
Description of problem:
The airo MPI350 in my IBM Thinkpad T41 laptop stopped working on my
laptop with recent rawhide kernels and the 5.00.x and latest 5.30.x
firmware versions. The last RH kernel tested to work properly was
release 397. After that point the "RFMON" fixes went into the kernel.
notting however said that it works on his firmware right now.
Firmware Version: 5b00.08
Warren's Laptop with kernel-2.6.6-1.397
[root@ibmlaptop eth0]# pwd
[root@ibmlaptop eth0]# cat Status
Status: CFG ACT SYN LNK PRIV KEY WEP
Signal Strength: 87
Signal Quality: 26
Driver Version: airo.c 0.6 (Ben Reed & Javier Achirica)
Device: 350 Series
Manufacturer: Cisco Systems
Firmware Version: 5.00.03
Radio type: 2
Hardware Version: ff
Software Version: 500
Software Subversion: 3
Boot block version: 159
Note that this proc directory is empty on the 422 kernel for me.
Attaching dmesg next.
Created attachment 100947 [details]
dmesg with 422 kernel showing airo failure.
Created attachment 100948 [details]
dmesg from 397 kernel showing working behavior prior to RFMON patch.
Created attachment 100972 [details]
reenable card reset when module is loaded
On my laptop (T40), it appeared that the initial card reset was not needed, but
this was certainly a bad idea, if it breaks on other hardwares ? Does this
patch helps ?
I also removed the card reset in airo_pci_resume() too, invoked when coming
back from APM/ACPI suspend, because I observed that the card could no longer
associate when coming back from Monitor to Managed mode, after the reset
command was issued (in airo_pci_resume()). Moreover, removing this reset didn't
generate bad consequences in my case, but YMMV.
So, if this patch works, does the card properly resume from ACPI and from APM
suspend too ? (it should not be necessary to ifdown/ifup the interface in the
I made some tests, and discovered that this buggy behaviour is
triggered by kudzu, and resolved by the above patch. If you don't see
other problems, I'll submit it to Javier.
The bug should be fixed in 2.6.7-bk3.
Thanks. Our latest released kernel reverted to the old airo, but we
will be sure that your latest airo driver is tested with our rawhide
kernel-2.6.7-1.448 seems to work on all firmware versions without
problems. Great work Fabrice! =)
Hm, I have a Thinkpad R40 with a Mini PCI 350 (Firmware 5b00.08),
which on Fedora Core 2, which works with kernel-2.6.5-1.358 and does
not work with kernel-2.6.7-1.494.2.2. The latter will not even allow
to unload the module again.
Oh, and I have kudzu disabled during startup.
I tested with firmware 5.00.03 and kernel-2.6.7-1.494.2.2, and it
works for me (it associates to the AP, with WEP enabled).
Unfortunately, firmware 5b00.08 isn't available from Cisco web site,
so I cannot use this exact version. Do you have any related errors in
the logs ?