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Trouble with Gentoo not recognizing Microphone
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Nick W
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Joined: 07 Dec 2003
Posts: 684

PostPosted: Sun Jan 02, 2005 5:36 pm    Post subject: Trouble with Gentoo not recognizing Microphone Reply with quote

Hello all,

Im seeing the following when doing "tail -f /var/log/messages"
Code:

Jan  2 18:48:16 nick ohci_hcd 0000:00:02.0: wakeup
Jan  2 18:48:16 nick usb 2-3: new full speed USB device using address 2
Jan  2 18:48:17 nick usb 2-3: device not accepting address 2, error -110
Jan  2 18:48:17 nick usb 2-3: new full speed USB device using address 3
Jan  2 18:48:17 nick usb 2-3: device not accepting address 3, error -110


Could anyone tell me what i need to be looking at in order to get this working and what i might use to test it once it seems "accepted"?

Many thanks....
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outwardly_mobile
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Joined: 21 Oct 2004
Posts: 8

PostPosted: Sun Jan 02, 2005 10:24 pm    Post subject: Reply with quote

Hi,

When a device is first powered on
it has an address of 0. When the usb driver detects it and is happy with the device it then sets it address to something other than 0. Leaving address 0 free for the next device. In your case what seems to be happening is that the ohci driver is trying to set the address and failing. This may be interrupt problems, cabling, hardware faults (controller and device) etc.

What type of USB card(s) have you tried this on?

-- Chris

FYI I dont know much about the linux usb architecture but I do know usb in general. Take this with a pinch of salt.
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Nick W
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Posts: 684

PostPosted: Mon Jan 03, 2005 8:12 am    Post subject: Reply with quote

Thanks for the info

I have no idea what kind of card - i have a nforce2 board and am plugging it into the front usb ports - which work fine for other usb devices...
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Nick W
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Joined: 07 Dec 2003
Posts: 684

PostPosted: Thu Jan 06, 2005 7:00 pm    Post subject: Reply with quote

Anyone?

I just cant get this to work and am out of ideas as to even where to start :(

Cheers..
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outwardly_mobile
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Joined: 21 Oct 2004
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PostPosted: Sat Jan 08, 2005 1:00 am    Post subject: Reply with quote

Hi again,

A bit of googling shows that the nforce2 boards are kinda well used, so the problem is unlikely to be in the controller.

This means that the problem is almost certainly in the microphone. Some vendors (rather stupidly) only test there hardware on windows. This means bugs in the hardware can slip through. For example, say windows performs operations 1, 2 and 3, one after another. Linux may perform them as 1, 3, 2. This may be totally legal as per the usb spec but could trigger a bug in the device.

If this assumption is correct, and it is a bug in the device, you have very limited options as to how you can fix it.

If you have access to another Linux / *BSD machine it would be worth testing it on there. If it works it might be worth pointing it out to one of the usb stack maintainers.

-- Chris
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