On Thu, 19 Apr 2007, Vitezslav Kotrla wrote: > Thanks for swift reply. I suspected hardware problems, too, so I did > some additional tests. On another computer (notebook, i386, kernel > 2.6.17) it behaves the same way - still keeps resetting repeatedly. > > On my main computer (AMD64, kernel 2.6.18) I had two successful > attempts, the device got detected in over 1 minute, then in 30 seconds, > then 8 attempts failed (well, I quit each attempt after 5 minutes) and > on the last one it was detected in some 90 seconds. > > I tried Windows XP on the _same_ hardware, the device is successfully > detected in about 5 seconds each time I plug it in. No drivers from > manufacturer, just out-of-the-box M$ mass storage support. It even shows > another drive for miniSD card slot present on the device (which I > haven't noticed before!) > > Well, this doesn't look like a hardware issue at the end of the day. > > It's rather frustrating, too. I'd be glad to provide more debugging data > to help improve support for this device in Linux kernel.
To start off, you need to collect some debugging logs. The best way to do that is to use the usbmon facility. Instructions are in the kernel source file Documentation/usb/usbmon.txt. Post the logfile you get when you plug in the device, you try to use it, and it gets an error. It may be a simple software setting (many devices don't implement the USB Mass Storage protocol correctly) that we can add to the kernel. Also, please provide the entry in /proc/bus/usb/devices for the MP3 player. Alan Stern ------------------------------------------------------------------------- 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-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
