Date: Tue, 22 Mar 2005 15:30:36 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Gary Jennejohn <garyj@jennejohn.org> Cc: Carlos Silva aka|Danger_Man| <full-disclosure@csilva.org> Subject: Re: USB 2.0 with bogus Data Rate Message-ID: <20050322143035.GX53520@cicely12.cicely.de> In-Reply-To: <200503220913.j2M9Dv4a003840@peedub.jennejohn.org> References: <20050322085033.GR53520@cicely12.cicely.de> <200503220913.j2M9Dv4a003840@peedub.jennejohn.org>
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On Tue, Mar 22, 2005 at 10:13:57AM +0100, Gary Jennejohn wrote: > > 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. The ehci can only do high-speed and the uhci companion only full and low speed. The BIOS is broken if it speaks about full (or low) speed on EHCI. > I have: ehci0: <VIA VT6202 USB 2.0 controller> Yes - but you device is not attached to your ehci controller. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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