Alan Stern wrote: > Okay. It's clear that you've got a hardware problem of some sort. > Hard to say what it is, but evidently the EHCI controller thinks that > the device is repeatedly being unplugged and replugged. > > Anyway, this isn't a problem of recognizing that a single device is > having problems. In fact the computer has no way of knowing that a > single device is involved; all it knows is that _something_ gets > plugged into the port and then removed. There's no way to tell if it's > the same _something_ from one iteration to the next. > > You can manually force the port to run at full speed instead of high > speed as follows: > > echo '4' >/sys/class/usb_host/usb_host4/companion > > The "companion" attribute file contains a list of ports which are > permanently set to be handled by the EHCI's companion controller. To > return to high-speed operation, use '-4' instead of '4' above. This > might or might not solve your problem -- the hardware bug might cause > the port to return automatically to high-speed regardless. > > Let me know what happens. > > Alan Stern
Yes that works. I tried to plug and unplug the device repeatedly and each time it came up in full-speed mode. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
