Kernel Bug Tracker – Bug 10941
Microphone don't work on Acer Aspire 5720
Last modified: 2009-07-29 16:58:35 UTC
Latest working kernel version: 220.127.116.11
Earliest failing kernel version:
Distribution: Debian Lenny
Hardware Environment: ALC268 on Acer Aspire 5720
The Microphone don't work, but in the kernel version 18.104.22.168 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.
Created attachment 16557 [details]
Change value "Internal Mic" to 0x1
Takashi, there's a patch here.
Juan, please submit patches via email, not via bugzilla.
Documentation/SubmitChecklist has details.
Suitable addressees are:
Andrew Morton <firstname.lastname@example.org>
Takashi Iwai <email@example.com>
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
Created attachment 16715 [details]
alsa-info for Acer Aspire 5720G
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.
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".
Created attachment 22524 [details]
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:  Power Management version 2
Capabilities:  Message Signalled Interrupts: Mask- 64bit+ Count=1/1 Enable-
Capabilities:  Express Root Complex Integrated Endpoint, MSI 00
Capabilities:  Virtual Channel <?>
Capabilities:  Root Complex Link <?>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
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.