On Wed, 24 Aug 2005, Dave North wrote: > There is perhaps an excessive interest in the device. However, I > applied the patch and have some results to report. But first a little > organized background: > > This USB2 device, and all others, will initialize and mount on the back > ports with kernel 2.6.x.x _every time_. No device, none, will mount > under 2.6.x.x on the front port, which is attached to hub3 on the > motherboard via a plug. All devices, including this one, will mount on > the front port under 2.4.3x (at least). So I have no reason to believe > the problem I'm seeing is device dependent.
Okay. So that patch I sent was unnecessary. I was fooled by the pattern of error messages. Forget about it. Mounting is the least of your problems. Those repeated errors and failures during enumeration are more troubling. Do they occur at all when you run 2.4? The log you posted had that portion cut out. It appears that some aspect of the ehci-hcd driver in 2.6 causes it to be more sensitive to signal distortions (caused by the longer cable connecting to the front ports) than the driver in 2.4. I have no idea what could have changed to cause that. Whatever the reason, once it's fixed I would expect all your problems to go away, both enumeration and mounting. On the other hand, this implies that changes to usb-storage or to the hub driver won't really help much. Is this true? That is, does enumeration still give a large number of errors when you use Dave's patch? Alan Stern ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
