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Date: Tue, 28 Jul 2009 12:11:38 +0100
Message-ID: <efe7343f0907280411y61e8a68dj500c2a74ad1af28a@mail.gmail.com>
Subject: Re: 2.6.31-rc2: Possible regression in rt61pci driver
From: Luis Correia <luis.f.correia@gmail.com>
To: Chris Clayton <chris2553@googlemail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>,
	Pavel Roskin <proski@gnu.org>, linux-wireless@vger.kernel.org,
	Ivo van Doorn <ivdoorn@gmail.com>
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Sender: linux-wireless-owner@vger.kernel.org

Hi Chris

On Tue, Jul 28, 2009 at 12:03, Chris Clayton<chris2553@googlemail.com> wrote:
> Hi everyone,
>
> 2009/7/27 Johannes Berg <johannes@sipsolutions.net>:
>> On Mon, 2009-07-27 at 21:22 +0100, Chris Clayton wrote:
>>
>>> Yes, I remove the card once the laptop has frozen, because doing so "thaws" it again. The laptop is
>>> then usable until 2-5 minutes after I insert the card again, when it will freeze again. I can
>>> repeat this cycle over and over.
>>
>
> Inspired by the fact that Pavel doesn't get the freeze, I've just
> cloned and tested the latest and greatest wireless-testing tree and,
> unfortunately, the freeze still occurs. In fact it seems to happen
> even more quickly now!
>
>> That really points to a hw (or hw programming) bug that causes the card
>> to lock up the bus. Had that many times in early b43 days.
>
> If it's a programming problem, might it be fixable in the firmware
> (rt2561s.bin)?
>
> If not and given this is a Belkin card (model F5D7010), I guess there
> could be thousands of them out there, so some note on the Devices
> section of linuxwireless.org might help other users. In fact two
> versions of this this model are currently shown as supported by the
> b43 driver, but this, which has worked fine until now, isn't mentioned
> at all. T
>
>>> > It looks like a problem specific to the hardware, not anything in the
>>> > common wireless code. ?I suggest that you post your question to
>>> > users@rt2x00.serialmonkey.com. ?That's the mailing list for rt61pci and
>>> > other Ralink devices.
>>>
>>> I think I'll just configure MAC80211 power saving off or use the ath5k card that I also own.
>>
>> You could also ask Ivo to disable power saving for rt61pci.
>>
>
> Rather than simply disabling power saving, could it be done though a
> module parameter, so that those with more robust cards are not
> disadvantaged?
>
> Chris

Can you do a very dumb test for me?

Boot your laptop by adding 'irqpoll' to the kernel command line
options and see if the problem still occours.

Luis Correia
rt2x00 project admin