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SubjectRe: HDA Intel microphone regression in 3.1.0
On 2 November 2011 12:25, Chris Vine <chris@cvine.freeserve.co.uk> wrote:
> My Lenovo S12 IdeaPad netbook uses a HDA Intel sound card with Realtek
> ALC269 chip.  With the 3.1.0 kernel, all microphone input (both with the
> internal microphone and any external microphone) is permanently
> muted, although sound output works OK.  Microphone input works correctly
> with the 3.0 and earlier kernels.
Could you please say do you have CONFIG_SND_HDA_GENERIC == y ?
I had experienced the same problem with CONFIG_SND_HDA_GENERIC = y
Turning it off it cured the problem for me.

>
> The only obvious difference between the 3.0 and 3.1 kernels is that
> with kernel 3.0.7, 'dmesg | grep HDA' gives this:
>
>  HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
>  HDA Intel 0000:00:1b.0: setting latency timer to 64
>  input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input10
>  input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
>  input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12
>
> whereas with kernel 3.1.0 it just gives:
>
>  input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input9
>  input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10
>  input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
>
> lspci -v gives the following audio hardware information:
>
>  00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)
>        Subsystem: Lenovo Device 3be9
>        Flags: bus master, fast devsel, latency 0, IRQ 22
>        Memory at fc140000 (64-bit, non-prefetchable) [size=16K]
>        Capabilities: [50] Power Management version 2
>        Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
>        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
>        Capabilities: [100] Virtual Channel
>        Capabilities: [130] Root Complex Link
>        Kernel driver in use: snd_hda_intel
>        Kernel modules: snd-hda-intel
>
> lsmod | egrep "snd|sound" gives:
>
>  snd_seq_dummy           1023  0
>  snd_seq_oss            23792  0
>  snd_seq_midi_event      4408  1 snd_seq_oss
>  snd_seq                39673  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
>  snd_seq_device          4121  3 snd_seq_dummy,snd_seq_oss,snd_seq
>  snd_pcm_oss            33087  0
>  snd_mixer_oss          12647  1 snd_pcm_oss
>  snd_hda_codec_realtek   205307  1
>  snd_hda_intel          18347  2
>  snd_hda_codec          64459  2 snd_hda_codec_realtek,snd_hda_intel
>  snd_hwdep               4420  1 snd_hda_codec
>  snd_pcm                57725  3 snd_pcm_oss,snd_hda_intel,snd_hda_codec
>  snd_timer              14567  2 snd_seq,snd_pcm
>  snd                    40539  15 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
>  soundcore               4129  1 snd
>  snd_page_alloc          5445  2 snd_hda_intel,snd_pcm
>
> Chris
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