nate at root.org
Wed Dec 29 15:28:44 PST 2004
Josef Karthauser wrote:
> On Wed, Dec 29, 2004 at 10:28:32AM -0800, Nate Lawson wrote:
>>Josef Karthauser wrote:
>>>Also, there are some funny things happening with sound. I can't get any
>>>audio out from the CD player (using cdcontrol to play) although I can
>>>hear mp3s. Also, when the laptop is connected to the docking station I
>>>can't get any sound out of the connected speakers. Do you know what
>>>might be wrong?
>>Uh, did you set mixer correctly for the CD player?
> Yup, the defaults appear to be ok.
> My guess is that the cd audio is routed via the laptop controller or
> something. There's something funny going on. The docking station has
> it's own amp and speakers and when the laptop is plugged into it I get
> no sound out at all, but it returns when I disconnect the laptop; the
> internal speakers get re-enabled.
Oh, I see. I thought you couldn't hear the CD player whether or not you
are docked. You can see your ACPI view of the device tree with:
acpidump -d | grep Device
You'll probably have a DCK (dock) device that has some sound device
under it. We don't have much docking support currently but if you boot
while docked, devices on it should work fine. I have patches for basic
docking support but the problem is there are many device drivers that
don't handle this properly yet. For instance, if you have a floppy
drive bay in the dock, the fdc(4) driver doesn't know yet how to handle
an undock event. We're just lucky that most laptops so far let the BIOS
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