high temperature problem

[Oleksij Rempel]

Hi,

Here are some results:
- First off all, temperature is proportional to electrical current... 
tada :)

- normally AR7010+AR9280 takes about 350mA; temperature: 60C+64C.
- after i set AR9280 with some brute force to D3, it used 80mA; temp: 
45C+40C.
- by using: iw dev wlan-test set power_save on; it use about 160mA, most 
of the time; temp: 49C+47C.

PS: 45C+40C should be read as AR7010+AR9280; first temp - AR7010.

Am 20.04.2013 00:42, schrieb Adrian Chadd:
> Well, now you have firmware source. :)
>
> I wonder if the increased temperature is two or one problem. Ie, is one
> chip causing the heat increase and it's traveling through the board, or
> are both going crazy,
>
> You could hack up an experiment - turn off the wifi chip in ath9k_htc by
> putting it into full sleep. Then measure the two temperatures.
>
> You can then write some custom wmi command to chew cpu cycles and see if
> that gives you a big increase of the CPU temp, with no corresponding
> increase in the AR9280 chip.
>
> I don't know anything about the power systems of either chip unfortunately.
>
> Good luck!
>
>
> Adrian
>
> Sent from my Palm Pre on AT&T
>
> ------------------------------------------------------------------------
> On Apr 19, 2013 7:45 AM, Oleksij Rempel <linux at rempel-privat.de> wrote:
>
> Am 11.04.2013 09:28, schrieb Oleksij Rempel:
>> Am 11.04.2013 02:30, schrieb Sujith Manoharan:
>>> Oleksij Rempel wrote:
>>>> i have two different adapters with ar7010. One of it gets pretty warm. I
>>>> assume it is clocked to higher speed. How is it controlled? By config
>>>> pins with pull up/down resistors? Or by registers?
>>>> How about AR9271?
>>>
>>> It is not only clock speed that can make the card get hot, there are
>>> various
>>> other factors too. Most likely, the HW code in the host driver has a bug.
>>>
>>> This is one example:
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=69bdacc8fbac32e4dc804ab13cafe3c1bbdcba9d
>>>
>>
>> That is interesting. Because AR7010+AR9280 seems to be warmer than
>> AR7010+AR9287. I will try to get more specific results that just - it
>> fill warm and other is warmer :)
>
> So,
> i got an IR-thermometer (Voltcraft IR 250-1LED)
>
> results are fallowing:
>
> - room t: 22C
>
> AR7010+AR9287:
> - AR7010 - 48C
> - AR9287 - 50C
>
> AR7010+AR9280:
> - AR7010 - 60C
> - AR9280 - 64C ... on active load i get even 68C
>
> i think that is really worm :)
>
> PS: renaming this topic to "high temperature problem" ;)
> --
> Regards,
> Oleksij
>
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-- 
Regards,
Oleksij