Date: Sun, 11 Apr 2010 13:01:17 +0200 From: Nikolaj Thygesen <mailinglist@diamondbox.dk> To: Programmer In Training <pit@joseph-a-nagy-jr.us> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: USB Powered Speakers Message-ID: <4BC1ABFD.2080102@diamondbox.dk> In-Reply-To: <4BBF727D.6000407@joseph-a-nagy-jr.us> References: <4BBE8DB1.8040905@joseph-a-nagy-jr.us> <i2t75107331004081934n2745bc80s827568d06743a9a@mail.gmail.com> <4BBE9470.1040607@joseph-a-nagy-jr.us> <u2r283c23cd1004082121ye23254a4v3286d9636ee88526@mail.gmail.com> <l2q283c23cd1004082123v2d9ca5f1h8561ff3ad41cd5fb@mail.gmail.com> <4BBEB5BC.3000509@joseph-a-nagy-jr.us> <4bbedc81.G0j71lonOCUqR/vZ%perryh@pluto.rain.com> <alpine.BSF.2.00.1004090518480.42950@wonkity.com> <4BBF2674.6080402@joseph-a-nagy-jr.us> <s2k283c23cd1004090815ga305418ahde3ba53621e4c29@mail.gmail.com> <4BBF727D.6000407@joseph-a-nagy-jr.us>
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Programmer In Training wrote:
> On 04/09/10 10:15, Brodey Dover wrote:
>
>> "Apr 8 22:30:16 heaven kernel: usb_alloc_device:1624: getting device
>> descriptor at addr 3 failed, USB_ERR_IOERROR!"
>>
>> exactly! That is what is causing the issues. From what I can see, it
>> is like it was explained before. The OS has chosen to play nice and
>> request that the speakers are disabled.
>>
>> The power requirements will not affect the system until the speakers
>> are producing sound. In other words, the system will only draw UP to
>> the power input rating while in operation. At idle, I'd wager they may
>> only use 1/10 of its power rating for the idle ICs and a power LED.
>>
> <snip>
>
> Only it's not the speakers that have their operation interrupted, JUST
> the keyboard (not even the mouse is affected).
>
>
Hi,
I don't know if my issue is related to the one debated in this
thread, but I just recently bought myself a pair of externally (regular
power supply; no USB power) powered speakers, that plug into the sound
card as usual, but when the speakers are powered up or down, my USB
mouse disappears for a few seconds! It happens every time, and the mouse
has its resoution reset. It's no big deal to me, but I'm a bit puzzled
as to how the simple sound card connection could reset a USB connection.
I'm not trying to hijack this thread, just thought the issues might
be related.
br - N :o)
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