Alan Stern píše v St 18. 04. 2007 v 23:04 +0200: > On Wed, 18 Apr 2007, Vitezslav Kotrla wrote: > > > I've got SanDisk Sansa c240 MP3 player here. It usually causes repeated > > USB resets and disconnects, but _sometimes_ it settles down and is > > eventually found. But settling down is rare - most of the time it just > > keeps resetting. ... > > Does this behavior ring a bell? > > Often these errors are caused by problems in communication, i.e., bad USB > cables or connections. (Sometimes the bad cables are the ones inside the > computer case, going from the USB port to the motherboard.)
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. Vit ------------------------------------------------------------------------- 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
