Please reply to the mailing list as well as to me. On Thu, 4 Aug 2005, Mark Rutherford wrote:
> G'day Alan, > > I haven't done too much more with this especially rebuilding the kernel > (due to experience level). > > But just to clarify the current situation / tests I've done: > > 1. if I plug the IOMEGA 128M memory stick into the onboard USB 1.1 ports > of the laptop, I can read and write successfully. > > 2. if I plug the IOMEGA superDVD USB2 into the USB 1.1 ports of the > laptop, I can read and burn cd and dvds. > > 3. if I plug in the BELKIN F5U222 USB 2.0 2 port pcmcia card, I can only > read at USB 1.1 speeds for the devices. What do you mean by this? Did you time how long a read takes and use that to calculate a transfer rate? Or did you look in the kernel log or in /proc/bus/usb/devices to see that the devices are using a 12 Mb/s connection? > As soon as I go to write to > either device (Memory stick or DVD Burner) the devices freeze. > > This is exactly what happened on Windows XP. When I downloaded the "ENE > Cardbus Drivers" from their website / drivers site instead of using the > default windows "generic" CARBUS drivers, I was then able to write and > BURN at USB2.0 speeds successfully. > > So I'm 95% sure that the ENE Technology CB710 carbus I have on this > laptop has a "feature" that the generic windows carbus and linux > yenta_Socket driver can't handled. > > I guess what I need to do is work out how to debug this and get logs to > you or other member who look after yenta / pcmcia driver for linux. > > I'm hoping to use debuging means without the need to rebuild the kernel > as I've haven't build the kerenl before. You probably won't have any choice about that -- much of the debugging in the kernel can be enabled only by rebuilding. Pretty much all of the USB debugging requires it. But don't worry; although time-consuming, building a kernel isn't all that hard. There is one thing you can try. Unload the EHCI driver from memory and then see if the card's controller works okay with only the OHCI driver. > Any tips / advice you can give me would be most grateful. Your suggestion sounded very good: Report this to the people in charge of Cardbus driver development. You can also try writing to the manufacturer for advice; occasionally that works. 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 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
