[ath9k-devel] still same problem

[W. van den Akker <listsrv@wilsoft.nl>]

On Sunday 18 January 2009, Luis R. Rodriguez wrote:
> On Sun, Jan 18, 2009 at 01:34:03AM -0800, W. van den Akker wrote:
> > On Sunday 18 January 2009, Dmitri Seletski wrote:
> > > W. van den Akker wrote:
> > > > On Sunday 04 January 2009 10:58:02 Jens Ott - Opteamax wrote:
> > > >> Hi,
> > > >>
> > > >> Luis R. Rodriguez schrieb:
> > > >>> On Sat, Jan 3, 2009 at 5:53 PM, Barry Green <barry@lemonpi.net>
> > > >>> wrote: [...]
> > > >>> We need an oops trace of your crashes so far it seems you have not
> > > >>> been able to get one, lets work on that. Until then it is not easy
> > > >>> for us to provide you with patches to fix your issues.
> > > >>
> > > >> I also have similar problems with an D-LINK DWA-547 and I'd really
> > > >> like to provide the oops trace, but unfortunately the machine seems
> > > >> to hang that fast, that even no oops trace is shown. Also
> > > >> magic-sysreq don't work anymore, neither via serial console nor via
> > > >> keyboard. Only chance I have in this moment is to press
> > > >> reset-button, which already caused a full xfs-filsystem-corruption
> > > >> with dataloss once :-(
> > > >>
> > > >> My problem is, that the hang happens not immediately after loading
> > > >> the driver but "somewhen" while it is loaded.
> > > >>
> > > >> I have seen two types of crash:
> > > >>
> > > >> 1.) first investigations on my side seem to show that it happens, as
> > > >> soon as there is high dataload transfered, but I don't have detailed
> > > >> info yet.
> > > >> 2.) Running hostapd works fine while started first time, but no
> > > >> client is connected. When a client connects a system freeze occures
> > > >> "sometimes". Reproducably the system freezes immediately when
> > > >> starting hostapd, stop it and then restart hostapd. So every change
> > > >> in hostapd conf needs a full reboot, unloading the ath9k module and
> > > >> reload it does not prevent freeze, but after reboot I can start
> > > >> hostapd once without a problem (only the metioned "sometime" freezes
> > > >> on client connect or high data-volume).
> > > >>
> > > >> As this machine is productive, I suspended testing for now. I will
> > > >> change the card into a non-productive environment in the next days.
> > > >> As soon as I find more details, I'll report.
> > > >>
> > > >>> Please test with the latest drivers from
> > > >>> wireless-testing/compat-wireless and restart in single user mode,
> > > >>> we want to ensure X is not running at all and you are in a virtual
> > > >>> terminal. We also do not want Network Manager or wpa_supplicant
> > > >>> running in the background. To increase the resolution upon bootup
> > > >>> try booting with vga=ask (vga=791 works well for me), then try to
> > > >>> associate to your access point without encryption manually using
> > > >>> iwconfig.
> > > >>
> > > >> Ok, that'll be a thing I'd need to test to, as in my case
> > > >> wpa_supplicant is running.
> > > >
> > > > Hi,
> > > >
> > > > What is the status of your problem? I still have problems with it and
> > > > have no progress...
> > > >
> > > > gr,
> > > > Willem
> > >
> > > Hello Willem.
> > >
> > > I think I have had similar issue to yours.
> > >
> > > Car was working for short period of time and after a while crashed
> > > computer. I was advised to change kernel version, i updated it to
> > > 2.6.27.9 and problem has gone away since.
> > > It's something to do with DMA.
> > >
> > > Perhaps try to upgrade kernel?
> > >
> > > Regards
> > > Dmitri
> >
> > I have tried all kernel versions till 2.6.28 and still have the same
> > hang-ups. I think indeed its a DMA-hardware-ath9k related problem.  The
> > patch in 2.6.27.8 didnt work for me. I have filled a bugreport on
> > bugzilla.kernel but because AP isnt supported untill 2.6.29 the report is
> > closed.
>
> A better description of this is that AP support does not work (is not
> allowed) and therefore not supported on < 2.6.28.
>
> > I will test today 2.6.29.rc2 and see if it has any progress.
>
> You can also try wireless-testing (entire kernel) or compat-wireless (just
> updates your wireless stuff) for bleeding edge stuff.
>

I tested it today with kernel 2.6.29-rc2. But no change. The kernel hangs 
completly (without oops or what so ever, even nmi-watchdog has no results).
It happend when I started the connection (from a IW4965 card). Then started up
a Kmail connection, start up a browser sessie. Stop Kmail, and start Kmail.

It also happens when I do a hostapd start, hostapd stop, hostapd start. 

Its a IBM 206 eserver, with no X running on it. The card is a WMP300N.

Any hints?

gr,
Willem


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