Hi there,
I've an HDA based chipset in a new Sony Vaio Z (Ivy Bridge). As sound as the system starts and the sound module are loaded, there's a constant noise (shhhhhhht) in the speakers. The noise change a bit if I toggle the mute button, but it's still there.
This noise stops as sound as I plug something in the jack port.
I've tried to play with HDA Analyzer¹, but I've no clue what to look for, so any hint appreciated.
Some information:
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
% aplay -l **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC275 Analog [ALC275 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0
% lsmod | grep snd snd_hda_codec_hdmi 30783 1 snd_hda_codec_realtek 50906 1 snd_hda_intel 26504 3 snd_hda_codec 83533 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel snd_hwdep 13186 1 snd_hda_codec snd_pcm 64080 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel snd_page_alloc 12969 2 snd_pcm,snd_hda_intel snd_seq 45130 0 snd_seq_device 13176 1 snd_seq snd_timer 22917 2 snd_pcm,snd_seq snd 53077 15 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_hda_codec,snd_hda_intel,snd_seq_device soundcore 13026 1 snd
/proc/asound/card0/codec#0 ==========================
/proc/asound/card0/codec#3 ==========================
¹ http://www.alsa-project.org/main/index.php/HDA_Analyzer