Date: Tue, 22 Mar 2005 10:13:57 +0100 From: Gary Jennejohn <garyj@jennejohn.org> To: ticso@cicely.de Cc: Julian Elischer <julian@elischer.org> Subject: Re: USB 2.0 with bogus Data Rate Message-ID: <200503220913.j2M9Dv4a003840@peedub.jennejohn.org> In-Reply-To: Message from Bernd Walter <ticso@cicely12.cicely.de> <20050322085033.GR53520@cicely12.cicely.de>
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Bernd Walter writes: > On Mon, Mar 21, 2005 at 11:42:40PM +0000, Carlos Silva aka|Danger_Man| wrote: > > Here is the rate: > > > > osiris# dd if=/dev/da0 of=/dev/null bs=64k > > ^C16+0 records in > > 16+0 records out > > 1048576 bytes transferred in 14.741515 secs (71131 bytes/sec) > > osiris# > > Are you shure that the device is really a high speed one? > USB 2.0 doesn't explizitly mean this. > In the list below it looks like the device is handled by an VIA > uhci controller - that is definitivley full speed only. > usbdevs -v will show you details about the current detection. > Moreover VIA controllers are known to cause problems. > But it's even much too slow for full speed. > There must be something elese - e.g. an IRQ problem. > The best choise would be to replace the controller with an NEC based > one. > Could also be a setting in the BIOS. Mine lets you choose between USB 1 and USB 2 speeds for the EHCI controller. I have: ehci0: <VIA VT6202 USB 2.0 controller> --- Gary Jennejohn / garyj[at]jennejohn.org gj[at]freebsd.org garyj[at]denx.de
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