Date: Fri, 09 Apr 2010 08:07:00 -0500 From: Programmer In Training <pit@joseph-a-nagy-jr.us> To: freebsd-questions@freebsd.org Subject: Re: USB Powered Speakers Message-ID: <4BBF2674.6080402@joseph-a-nagy-jr.us> In-Reply-To: <alpine.BSF.2.00.1004090518480.42950@wonkity.com> 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>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF185F5A30775FB9A2A4521EC Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 04/09/10 06:25, Warren Block wrote: > On Fri, 9 Apr 2010, perryh@pluto.rain.com wrote: >=20 >> Programmer In Training <pit@joseph-a-nagy-jr.us> wrote: >> >>> ... they are only attached for power purposes ... >> >>> Input power: DC 5V 500mA >> >> Any chance these speakers need a USB 2.0 port, and all the ports >> on your FreeBSD box are 1.x? I don't remember the USB power spec >> offhand, but 2.5W may exceed what a USB 1.x port can supply -- >> a limit that applies regardless of the system's overall power >> provisioning. >=20 > 500 mA is 5 unit loads for USB 2.0, or powered hub territory. The > device has to request that high power mode, and the system can say no > and disable the port. That should show in /var/log/messages. <snip> The following messages so far haven't shown up today. Apr 8 22:30:01 heaven root: Unknown USB device: vendor 0x046e product 0x5542 bus uhub4 Apr 8 22:30:01 heaven kernel: uhid0: <vendor 0x046e product 0x5542, class 0/0, rev 1.10/1.10, addr 3> on usbus4 Apr 8 22:30:01 heaven kernel: uhub_explore:611: illegal enable change, port 3 Apr 8 22:30:15 heaven kernel: ugen4.3: <vendor 0x046e> at usbus4 (disconnected) Apr 8 22:30:15 heaven kernel: ukbd0: at uhub4, port 3, addr 3 (disconnected) Apr 8 22:30:15 heaven kernel: uhid0: at uhub4, port 3, addr 3 (disconnected) Apr 8 22:30:16 heaven kernel: usb_alloc_device:1586: set address 3 failed (USB_ERR_IOERROR, ignored) Apr 8 22:30:16 heaven kernel: usb_alloc_device:1624: getting device descriptor at addr 3 failed, USB_ERR_IOERROR! --=20 Yours In Christ, PIT Emails are not formal business letters, whatever businesses may want. Original content copyright under the OWL http://owl.apotheon.org Please do not CC me. If I'm posting to a list it is because I am subscrib= ed. --------------enigF185F5A30775FB9A2A4521EC Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iQEcBAEBAgAGBQJLvyaIAAoJEENZQ8DH7rW0KMAH/RKS5lL6wPLrtAUEZJFJ3dlW hrXwIK+jvwv4ZQF/f+i0oXgQz/YgQAK8I0LllyU6r7vUSARl0+ETCvQuB/5V+XgA qhdikHelHaDnBM3Yt3//XCnIRlAPRFTIH8zpub99DtqkMeq1IecxRM8NYqr9jzJN edfzi/xLGhzWJ81JlGcJmqWIetgmqB2NwhU8gl8UAryRDocOR54pBiL1ymXouWMT HLKANWqHokwk5ehA7DX7TjtG5keqDAUTaieJEKlEZw9koG87vknzVvGLkPzOYBRz QE/+cw+C1yCyQqbfhUITDEOcAUxLB/8qyQm8sllH4YLDg7I9viBOQpx8qTAjLGo= =ECKL -----END PGP SIGNATURE----- --------------enigF185F5A30775FB9A2A4521EC--
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