Bug#430017: kernel: Recording silence, chipset: Cirrus Logic CS 4614/22/24 [CrystalClear SoundFusion Audio Accelerator]
reassign 430017 linux-2.6
thanks
On Thu, Jun 21, 2007 at 08:30:59PM +0100, Bernard Boudet wrote:
> Package: kernel
> Version: Linux 2.6.18-4-686 #1 SMP Wed May 9 23:03:12 UTC 2007 i686 GNU/Linux
> Severity: normal
>
>
> As reported in this post, and its various follow-ups:
>
> http://lists.debian.org/debian-user/2007/06/msg01762.html
>
> Microphone is set as the capture device, but when recording with
> audacity, arecord, or the gnome sound recorder only silence is
> recorded.
>
> Same behaviour on two different machines, which coincidently have the
> same chipset. I'm assuming that is relevant hence this bug report is
> against kernel package.
>
> Dell Precision 420 desktop:-
>
> 02:06.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 [CrystalClear SoundFusion Audio Accelerator] (rev 01)
> Subsystem: Dell Unknown device 0096
> Flags: bus master, medium devsel, latency 64, IRQ 193
> Memory at fcffe000 (32-bit, non-prefetchable) [size=4K]
> Memory at fce00000 (32-bit, non-prefetchable) [size=1M]
> Capabilities: [40] Power Management version 2
>
> IBM Thinkpad T21 laptop:-
>
> 00:05.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 [CrystalClear SoundFusion Audio Accelerator] (rev 01)
> Subsystem: IBM ThinkPad A20m
> Flags: bus master, slow devsel, latency 64, IRQ 11
> Memory at e8122000 (32-bit, non-prefetchable) [size=4K]
> Memory at e8000000 (32-bit, non-prefetchable) [size=1M]
> Capabilities: [40] Power Management version 2
>
> It must be said that I have not yet had microphone working in
> GNU/Linux, the above being the only two Debian machines available to
> me. However, I'm pretty certain it's set up correctly:
>
> In the Gnome volume control:
> Playback tab - Microphone slider is set to 100, and not muted
> Capture tab - Both sliders set to 100 and not muted
> Switches tab - Microphone Capture is ticked
> Options tab - Mic Select set to Mic1, Mono select set to Mic
>
> Alternatively, using alsamixer:
>
> In 'Capture view', above Mic is written CAPTUR, also above Capture is
> written CAPTUR and the Capture slider is set to 100<>100.
>
> In 'Playback view' the Mic slider is set to 100, and not muted [00].
>
> With these setting, the mic sounds are heard through the PC speakers
> but Audacity (or any other app) records only silence.
>
> More details here -
> http://lists.debian.org/debian-user/2007/06/msg01762.html
Does this error still occur with more recent kernel versions?
Cheers,
Moritz
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