Bug 10941 - Microphone don't work on Acer Aspire 5720
Microphone don't work on Acer Aspire 5720
Product: Drivers
Classification: Unclassified
Component: Sound(ALSA)
All Linux
: P1 high
Assigned To: Takashi Iwai
Depends on:
  Show dependency treegraph
Reported: 2008-06-19 22:44 UTC by Juan Pizarro
Modified: 2009-07-29 16:58 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.26-rc6
Tree: Mainline
Regression: No

Change value "Internal Mic" to 0x1 (395 bytes, patch)
2008-06-19 22:48 UTC, Juan Pizarro
Details | Diff
alsa-info for Acer Aspire 5720G (14.92 KB, text/plain)
2008-07-03 04:14 UTC, Juan Pizarro
config-2.6.30-gentoo-r1 (50.64 KB, text/plain)
2009-07-29 16:38 UTC, pi3mm3

Description Juan Pizarro 2008-06-19 22:44:20 UTC
Latest working kernel version:
Earliest failing kernel version:
Distribution: Debian Lenny
Hardware Environment: ALC268 on Acer Aspire 5720
Software Environment:
Problem Description:
The Microphone don't work, but in the kernel version work fine.

In the file sound/pci/hda/patch_realtek.c the value of "Internal Mic" on static struct hda_input_mux alc268_acer_capture_source, should be 0x1, as before in the 2.6.25.x kernel.

that work for my notebook.
Comment 1 Juan Pizarro 2008-06-19 22:48:09 UTC
Created attachment 16557 [details]
Change value "Internal Mic" to 0x1
Comment 2 Andrew Morton 2008-07-01 14:19:44 UTC
Takashi, there's a patch here.

Juan, please submit patches via email, not via bugzilla.

Documentation/SubmitChecklist has details.

Suitable addressees are:

Andrew Morton <akpm@linux-foundation.org>
Takashi Iwai <tiwai@suse.de>

Comment 3 Takashi Iwai 2008-07-02 02:42:40 UTC
Then the pin mapping is different from other Acer laptops.  Your patch could break other machines, so it can't be applied as is.

For further analysis, please run alsa-info.sh with --no-upload option and attach the generated file here.  The script is found at

Comment 4 Juan Pizarro 2008-07-03 04:14:58 UTC
Created attachment 16715 [details]
alsa-info for Acer Aspire 5720G
Comment 5 Juan Pizarro 2008-10-09 16:30:13 UTC
Today i update the kernel code to git://git.kernel.org/pub/scm/linux/kernel/git/nigelc/tuxonice-head.git and the internal Mic from my Acer Aspire 5720 don't work.

The solution in the patch http://bugzilla.kernel.org/attachment.cgi?id=16557 work for this model.

In this moment exist in code the quirk for the aspire 5720z on
SND_PCI_QUIRK(0x1025, 0x011e, "Acer Aspire 5720z", ALC268_ACER)
the problem is, the device code "0x011e", is the same for my acer (exist other way to select betwen the models? ).

I don't know if the internal mic works on 5720z model.

Comment 6 pi3mm3 2009-07-29 16:36:57 UTC
Hi, I have the same problem with my Toshiba Portege m750.
The kernel version is 2.6.30-gentoo-r1 but even with the 2.6.29 version I wasn't able to use internal microphone.
The only thing I know is that the codec is "Realtek ALC268".
Comment 7 pi3mm3 2009-07-29 16:38:15 UTC
Created attachment 22524 [details]
Comment 8 pi3mm3 2009-07-29 16:40:43 UTC
This is the audio device:

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
	Subsystem: Toshiba America Info Systems Device 0001
	Flags: bus master, fast devsel, latency 0, IRQ 22
	Memory at ff9f8000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
	Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Count=1/1 Enable-
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [100] Virtual Channel <?>
	Capabilities: [130] Root Complex Link <?>
	Kernel driver in use: HDA Intel
	Kernel modules: snd-hda-intel
Comment 9 Takashi Iwai 2009-07-29 16:57:42 UTC
A different machine, a different problem.  Please don't mix up, but open another bug report.

AFAIK, the problem of Acer Aspire 5720 was already fixed in the recent kernel.
Let's close now.

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