From: salvador <salvador@inti.gov.ar>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: raul@dif.um.es, linux-kernel@vger.kernel.org
Subject: Re: compaq presario 706 EA via 686a sound card
Date: Fri, 11 Jan 2002 16:56:55 -0300 [thread overview]
Message-ID: <3C3F4387.E8330684@inti.gov.ar> (raw)
In-Reply-To: <E16P7kZ-0000A0-00@the-village.bc.nu>
Alan Cox wrote:
> Its common for laptops to have some kind of amplifier control (to powersave
> better). Firstly does the problem show up with ACPI not compiled into the
> system ?
>
> If it still shows up then I guess you want to try flipping the EAPD bit
> on the AC97 codec and hoping that the amp was wired conventionally
I agree:
I just read the mail of other user with this problem. As I pointed in that
mail the codec seems to be AD1885 or newer (AD1885 is 0x60 and this machine
seems to have 0x61, maybe a revision, didn't have time to look for data
sheets).
The AD1885 needs EAPD control (default_ops) but as the coded wasn't detected
null_ops are used and the amplifier is blocked giving almost no volume.
SET
--
Salvador Eduardo Tropea (SET). (Electronics Engineer)
Visit my home page: http://welcome.to/SetSoft or
http://www.geocities.com/SiliconValley/Vista/6552/
Alternative e-mail: set@computer.org set@ieee.org
Address: Curapaligue 2124, Caseros, 3 de Febrero
Buenos Aires, (1678), ARGENTINA Phone: +(5411) 4759 0013
next prev parent reply other threads:[~2002-01-11 19:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-11 19:31 compaq presario 706 EA via 686a sound card Raul Sanchez Sanchez
2002-01-11 19:54 ` Alan Cox
2002-01-11 19:56 ` salvador [this message]
2002-01-11 20:11 ` salvador
2002-01-11 20:21 ` salvador
2002-01-11 20:25 ` Raul Sanchez Sanchez
2002-01-12 0:28 ` Raul Sanchez Sanchez
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