I solved the problem it should be caused by a ground loop, I change the
eletric plugin so it use a different ground and the white noise is
vanished, so it wasn't related with alsa or module configuration.
Sorry for the post.
Regards
Luca
2012/11/7 Luca Cazzaniga <fusilla...@gmail.com>
> Hi all, I tested the sound card problem with xubuntu, now i got the sound
> with a perturbing crackling.
>
> The kernel used is 3.5.0-18 generic x86_64
> The alsa version is 1.0.25 and the driver selected by udevd is the
> snd_hda_intel
>
> $ lspci -k -nn -q -s 00:1b.0
> 00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series
> Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
> Subsystem: Acer Incorporated [ALI] Device [1025:0649]
> Kernel driver in use: snd_hda_intel
> Kernel modules: snd-hda-intel
>
> Finally I find out that the cracking occurs when the power supply, when
> the power is plugged and the battery is recharging.
> I'm not sure it's related to alsa configuration.
>
> Has anyone solved this kind of problem?
> Should it be related to the frequencies range of the sound card?
>
>
>
>
>
>
>
>
>
> 2012/11/4 Luca Cazzaniga <fusilla...@gmail.com>
>
>> Hi all, I've some driver problem with an acer aspire e1-531 notebook.
>> It seems no audio card is recognized:
>>
>> cat /proc/asound/cards
>> --- no soundcards ---
>>
>> I'm not sure if snd-hda-intel is the correct module to use, anyway I
>> failed with the following option:
>>
>> sudo modprobe snd-hda-intel model=auto
>> sudo modprobe snd-hda-intel model=aspire
>> sudo modprobe snd-hda-intel model=acer-aspire
>> sudo modprobe snd-hda-intel probe_mask=1
>>
>>
>> the bash script alsa-info.sh made the following report:
>>
>> http://www.alsa-project.org/db/?f=e8d8f0371d3dce70c59ca6c1132bae452f1fff65
>>
>> i've no idea how to solve the problem, thanks for any hints.
>>
>> Regards
>>
>
>
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