On Wed, 20 Dec 2006, Andy Dalton wrote: > Greetings all, > > I have a set of seven ftdi_sio devices connected to a seven-port USB > hub (actually I have several hubs connected, one of which is giving me > this problem). When I plug the hub into the machine with all devices > connected to the hub, the lights on the hub corresponding to each of > the ports start to light up, one-by-one. In the past, all the lights > would turn on and everything worked properly; however, lately a few of > the lights will turn on, then all lights turn off, and this repeats > indefinitely. I've include a copy of a sample of the logs that are > generated when this occurs. > > The devices I'm working with are full-speed devices, so I'm not using > EHCI at all. > > Anyone have any idea what might be causing this? If you need any > additional information, please let me know.
... > hub 5-2:1.0: cannot reset port 2 (err = -71) > hub 5-2:1.0: port 2 not enabled, trying reset again... > uhci_hcd 0000:00:1d.2: uhci_result_control: failed with status 440000 > [f7df7380] link (37df7302) element (353f5150) > urb_priv [f58d63d8] urb [f5c715c0] qh [f7df7380] Dev=42 EP=0(OUT) CTL FSBR > 1: [f53f5150] link (353f5090) e0 Stalled CRC/Timeo Length=7 MaxLen=7 > DT0 EndPt=0 Dev=2a, PID=2d(SETUP) (buf=37596aa0) > 2: [f53f5090] link (353f5180) e3 IOC Active Length=0 MaxLen=7ff DT1 > EndPt=0 Dev=2a, PID=69(IN) (buf=00000000) > Dummy TD > [f53f5180] link (353f5090) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=0, > PID=e1(OUT) (buf=00000000) Errors like this are caused by communication problems between the computer and the hub. It could be that the hub itself is misbehaving, or there could be something wrong with the USB cable or with the computer's USB port. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
