Re: [ipw3945-devel] [BUG] iwlwifi 3945 works only with disable_hw_scan=1

[Maxim Levitsky <maximlevitsky@gmail.com>]

Tomas Winkler wrote:
> On Fri, Jun 13, 2008 at 6:06 PM, Maxim Levitsky <maximlevitsky@gmail.=
com> wrote:
>> Tor H=E5kon Haugen wrote:
>>> John W. Linville wrote:
>>>> On Fri, Jun 13, 2008 at 03:35:23PM +0800, Zhu Yi wrote:
>>>>> On Thu, 2008-06-12 at 09:59 -0400, John W. Linville wrote:
>>>>>> Honestly I'm tempted to change it to "enable_hw_scan" instead...
>>>>> Give the advantages, I'd like to use it if we can fix the bug (I =
haven't
>>>>> seen what the bug is myself). But you are free to change the defa=
ult
>>>>> value until it is fixed. There is no such problem for 4965, right=
?
>>>> AFAICT only the 3945 seems to need it.
>>>>
>>> I can confirm that this also applies to 4965 as a friend of mine ha=
s
>>> this card. According to him the card works a lot better with the
>>> parameters "swcrypto=3D1" and "disable_hw_scan=3D1".
>> Just to make it clear,
>> iwl3945 doesn't work at all without disable_hw_scan=3D1 here.
>> The driver just shuts down thee card since it detects microcode erro=
r.
>>
>=20
> It looks like this is all caused by the big rate, band patch. Looks
> like A band scan channels are not configured correctly for the
> scanning. This crashes the firmware.
>=20
> Tomas

Probably, I see that eeprom according to dmesg contains no info about A
channels, so maybe this crashes the firmware.

I have few questions:

* Is there a software workaround without the need to update the firmwar=
e?

* Is the firmware error so harmful, so driver can't continue?

* Can I expect updated version of the firmware with  fix?

Sadly this confirms that firmware is worse that I thought, it is closer=
=20
to closed drivers.

(Although intel isn't guilty in this case due to regulations.)

Best regards,
	Maxim Levitsky
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