Messages in this thread | | | Date | Fri, 11 Jan 2002 16:56:55 -0300 | From | salvador <> | Subject | Re: compaq presario 706 EA via 686a sound card |
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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
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