iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Stevie Trujillo]

Hello,

I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15 and I 
was wondering if the card could do more than that.

Thank you

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[wwguy]

On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> Hello,
> 
> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15 and I 
> was wondering if the card could do more than that.
> 
the card should not and will not do more than what required by
regulatory

Thanks
Wey

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Stevie Trujillo]

On Wednesday 25 May 2011 21:42:40 wwguy wrote:
> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> > Hello,
> > 
> > I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
> > and I was wondering if the card could do more than that.
> 
> the card should not and will not do more than what required by
> regulatory

I'm allowed to do 20dBm here and was wondering if I could make the card do 
that.

Thanks
Stevie

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[wwguy]

On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
> > On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> > > Hello,
> > > 
> > > I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
> > > and I was wondering if the card could do more than that.
> > 
> > the card should not and will not do more than what required by
> > regulatory
> 
> I'm allowed to do 20dBm here and was wondering if I could make the card do 
> that.
> 
the tx power in Intel WiFi device is regulated by uCode to make sure we
are within regulatory limits. What country you are in? 

Thanks
Wey

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Stevie Trujillo]

On Thursday 26 May 2011 04:28:58 wwguy wrote:
> On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
> > On Wednesday 25 May 2011 21:42:40 wwguy wrote:
> > > On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> > > > Hello,
> > > > 
> > > > I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is
> > > > 15 and I was wondering if the card could do more than that.
> > > 
> > > the card should not and will not do more than what required by
> > > regulatory
> > 
> > I'm allowed to do 20dBm here and was wondering if I could make the card
> > do that.
> 
> the tx power in Intel WiFi device is regulated by uCode to make sure we
> are within regulatory limits. What country you are in?

Norway

Thanks
Stevie

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Richard Schütz]

> On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
>> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
>>> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
>>>> Hello,
>>>>
>>>> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
>>>> and I was wondering if the card could do more than that.
>>>
>>> the card should not and will not do more than what required by
>>> regulatory
>>
>> I'm allowed to do 20dBm here and was wondering if I could make the card do
>> that.
>>
> the tx power in Intel WiFi device is regulated by uCode to make sure we
> are within regulatory limits. What country you are in?
>
> Thanks
> Wey

I am also having the same issue with my Intel PRO/Wireless 5100 AGN. 
Here in Germany I'm allowed to use 20 dBm (in the 2.4 GHz band), but the 
card is limited to 15 dBm. So in some situations other cards are working 
fine (as they use 20 dBm) and the Intel can't establish a connection.

-- 
Regards,
Richard Schütz

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[wwguy]

On Thu, 2011-05-26 at 01:50 -0700, Richard Schütz wrote:
> > On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
> >> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
> >>> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> >>>> Hello,
> >>>>
> >>>> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
> >>>> and I was wondering if the card could do more than that.
> >>>
> >>> the card should not and will not do more than what required by
> >>> regulatory
> >>
> >> I'm allowed to do 20dBm here and was wondering if I could make the card do
> >> that.
> >>
> > the tx power in Intel WiFi device is regulated by uCode to make sure we
> > are within regulatory limits. What country you are in?
> >
> > Thanks
> > Wey
> 
> I am also having the same issue with my Intel PRO/Wireless 5100 AGN. 
> Here in Germany I'm allowed to use 20 dBm (in the 2.4 GHz band), but the 
> card is limited to 15 dBm. So in some situations other cards are working 
> fine (as they use 20 dBm) and the Intel can't establish a connection.
> 
We do not have different SKUs for different regions of the world. Now I
understand your problem. Thank you very much for reporting. I will raise
the issue and see how we should fix it. 

Sorry, I don't have a solution for you today. But it is very important
for us and we need to result it.
  
Thanks
Wey

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Richard Schütz]

On 26.05.2011 16:11, wwguy wrote:
> On Thu, 2011-05-26 at 01:50 -0700, Richard Schütz wrote:
>>> On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
>>>> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
>>>>> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
>>>>>> Hello,
>>>>>>
>>>>>> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
>>>>>> and I was wondering if the card could do more than that.
>>>>>
>>>>> the card should not and will not do more than what required by
>>>>> regulatory
>>>>
>>>> I'm allowed to do 20dBm here and was wondering if I could make the card do
>>>> that.
>>>>
>>> the tx power in Intel WiFi device is regulated by uCode to make sure we
>>> are within regulatory limits. What country you are in?
>>>
>>> Thanks
>>> Wey
>>
>> I am also having the same issue with my Intel PRO/Wireless 5100 AGN.
>> Here in Germany I'm allowed to use 20 dBm (in the 2.4 GHz band), but the
>> card is limited to 15 dBm. So in some situations other cards are working
>> fine (as they use 20 dBm) and the Intel can't establish a connection.
>>
> We do not have different SKUs for different regions of the world. Now I
> understand your problem. Thank you very much for reporting. I will raise
> the issue and see how we should fix it.
>
> Sorry, I don't have a solution for you today. But it is very important
> for us and we need to result it.
>
> Thanks
> Wey

Is there any news?

-- 
Regards,
Richard Schütz

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Guy, Wey-Yi]

On Fri, 2011-06-10 at 09:31 -0700, Richard Schütz wrote:
> On 26.05.2011 16:11, wwguy wrote:
> > On Thu, 2011-05-26 at 01:50 -0700, Richard Schütz wrote:
> >>> On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
> >>>> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
> >>>>> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
> >>>>>> Hello,
> >>>>>>
> >>>>>> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
> >>>>>> and I was wondering if the card could do more than that.
> >>>>>
> >>>>> the card should not and will not do more than what required by
> >>>>> regulatory
> >>>>
> >>>> I'm allowed to do 20dBm here and was wondering if I could make the card do
> >>>> that.
> >>>>
> >>> the tx power in Intel WiFi device is regulated by uCode to make sure we
> >>> are within regulatory limits. What country you are in?
> >>>
> >>> Thanks
> >>> Wey
> >>
> >> I am also having the same issue with my Intel PRO/Wireless 5100 AGN.
> >> Here in Germany I'm allowed to use 20 dBm (in the 2.4 GHz band), but the
> >> card is limited to 15 dBm. So in some situations other cards are working
> >> fine (as they use 20 dBm) and the Intel can't establish a connection.
> >>
> > We do not have different SKUs for different regions of the world. Now I
> > understand your problem. Thank you very much for reporting. I will raise
> > the issue and see how we should fix it.
> >
> > Sorry, I don't have a solution for you today. But it is very important
> > for us and we need to result it.
> >
> > Thanks
> > Wey
> 
> Is there any news?
> 
Hi, I talk to the marketing and since we are providing single SKU
solution, the maximum allowed tx power is programmed in EEPROM, so
currently there is no method to allow use the higher limitation.

Thanks
Wey

Re: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Richard Schütz]

Am 10.06.2011 19:31, schrieb Guy, Wey-Yi:
> On Fri, 2011-06-10 at 09:31 -0700, Richard Schütz wrote:
>> On 26.05.2011 16:11, wwguy wrote:
>>> On Thu, 2011-05-26 at 01:50 -0700, Richard Schütz wrote:
>>>>> On Wed, 2011-05-25 at 12:54 -0700, Stevie Trujillo wrote:
>>>>>> On Wednesday 25 May 2011 21:42:40 wwguy wrote:
>>>>>>> On Wed, 2011-05-25 at 09:13 -0700, Stevie Trujillo wrote:
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> I have a "Intel(R) Centrino(R) 1030 BGN" card. tx_power_device_lmt is 15
>>>>>>>> and I was wondering if the card could do more than that.
>>>>>>>
>>>>>>> the card should not and will not do more than what required by
>>>>>>> regulatory
>>>>>>
>>>>>> I'm allowed to do 20dBm here and was wondering if I could make the card do
>>>>>> that.
>>>>>>
>>>>> the tx power in Intel WiFi device is regulated by uCode to make sure we
>>>>> are within regulatory limits. What country you are in?
>>>>>
>>>>> Thanks
>>>>> Wey
>>>>
>>>> I am also having the same issue with my Intel PRO/Wireless 5100 AGN.
>>>> Here in Germany I'm allowed to use 20 dBm (in the 2.4 GHz band), but the
>>>> card is limited to 15 dBm. So in some situations other cards are working
>>>> fine (as they use 20 dBm) and the Intel can't establish a connection.
>>>>
>>> We do not have different SKUs for different regions of the world. Now I
>>> understand your problem. Thank you very much for reporting. I will raise
>>> the issue and see how we should fix it.
>>>
>>> Sorry, I don't have a solution for you today. But it is very important
>>> for us and we need to result it.
>>>
>>> Thanks
>>> Wey
>>
>> Is there any news?
>>
> Hi, I talk to the marketing and since we are providing single SKU
> solution, the maximum allowed tx power is programmed in EEPROM, so
> currently there is no method to allow use the higher limitation.
>
> Thanks
> Wey

According to [1] there are no countries that forbid tx power values 
lower than 20dBm in the 2.4 GHz band. The lowest value for the 5 GHz 
band listed is 17 dBm. So why are the Intel cards limited to 15dBm then 
for both bands? This value absolutely makes no sense in my view.

[1] 
http://git.kernel.org/?p=linux/kernel/git/linville/wireless-regdb.git;a=blob;f=db.txt;hb=HEAD

-- 
Regards,
Richard Schütz

Fwd: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Daniel Halperin]

PSA: it's 2011, not 1971. The plaintext filter on l-w is stupid. If
its main goal is to ensure that patches come through correctly, it
doesn't help that much. Independent of plaintext, people still have to
jump through hoops to make sure the line wrapping comes through okay.

See below mail.

---------- Forwarded message ----------
From: Daniel Halperin <dhalperi@cs.washington.edu>
Date: Fri, Jun 10, 2011 at 11:37 AM
Subject: Re: iwlagn: is tx_power_device_lmt a regulatory limit or a
hardware limit?
To: Richard Schütz <r.schtz@t-online.de>
Cc: "Guy, Wey-Yi" <wey-yi.w.guy@intel.com>, Stevie Trujillo
<stevie.trujillo@gmail.com>, "linux-wireless@vger.kernel.org"
<linux-wireless@vger.kernel.org>


On Fri, Jun 10, 2011 at 11:24 AM, Richard Schütz <r.schtz@t-online.de> wrote:
>
> According to [1] there are no countries that forbid tx power values lower than 20dBm in the 2.4 GHz band. The lowest value for the 5 GHz band listed is 17 dBm. So why are the Intel cards limited to 15dBm then for both bands? This value absolutely makes no sense in my view.
>
> [1] http://git.kernel.org/?p=linux/kernel/git/linville/wireless-regdb.git;a=blob;f=db.txt;hb=HEAD
>

Are you forgetting to account for the 3 dBi--7 dBi antenna gain?
Dan

Re: Fwd: iwlagn: is tx_power_device_lmt a regulatory limit or a hardware limit?

[Richard Schütz]

Am 10.06.2011 20:42, schrieb Daniel Halperin:
> On Fri, Jun 10, 2011 at 11:24 AM, Richard Schütz<r.schtz@t-online.de>  wrote:
>>
>> According to [1] there are no countries that forbid tx power values lower than 20dBm in the 2.4 GHz band. The lowest value for the 5 GHz band listed is 17 dBm. So why are the Intel cards limited to 15dBm then for both bands? This value absolutely makes no sense in my view.
>>
>> [1] http://git.kernel.org/?p=linux/kernel/git/linville/wireless-regdb.git;a=blob;f=db.txt;hb=HEAD
>>
>
> Are you forgetting to account for the 3 dBi--7 dBi antenna gain?
> Dan

We are talking about wireless devices that are primarily used in 
portable computers. These do not have directional antennas usually. So 
there should be almost no antenna gain in most cases.

-- 
Regards,
Richard Schütz