On Mon, 30 May 2005, Guennadi Liakhovetski wrote: > Hi > > I have a 2.0 hub, and 2 2.0 cards (ALi OHCI and VIA UHCI) in 2 PCs. A > high-speed memory stick works directly without a hub ok in both cards, > works in the hub connected to VIA, but produces only errors in the hub > connected to ALi. The complete USB log with verbose usb-storage debugging > attached. This configuration (ALi + hub) doesn't work reliably with other > 1.1 devices either. It did work before in this computer, but I am not sure > anymore, if it was before I swapped the ALi and VIA cards or after... I > think, it did work after - i.e. in the present configuration. Now it > doesn't work with 2.4 kernels either. Tried with and without external > power supply to the hub. Attached also lspci -v and /proc/bus/usb/devices. > > Can it be the hub dying in such a strange way? When plugged in into a 1.1 > port it does work too.
It's not the hub dying -- at least, it doesn't seem to be. It appears that the transfers using the hub were slightly unreliable, and the error recovery procedure didn't work too well. The device just got very confused and disconnected itself from the USB bus temporarily. There are some patches pending in the usb-storage queue that may help prevent things from getting so confused in the first place. Trying these two: https://lists.one-eyed-alien.net/pipermail/usb-storage/2005-April/001565.html https://lists.one-eyed-alien.net/pipermail/usb-storage/2005-April/001558.html Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
