Hi Fabio, > Fabio Estevam <festevam@xxxxxxxxx> hat am 22. Dezember 2015 um 23:54 > geschrieben: > > > Hi, > > On a mx28 custom board with a USB hub I can get a USB stick to get > detected after applying this change: > http://marc.info/?l=linux-usb&m=145079935324339&w=2 > > Things work fine if I boot without the USB stick connected. Then I can > insert/remove the USB device and it always gets detected. > > However, if I boot with the USB stick connected I get: > > [ 2.968513] hub 1-1:1.0: USB hub found > [ 2.973096] hub 1-1:1.0: 2 ports detected > [ 3.479731] usb 1-1: USB disconnect, device number 2 > [ 3.525403] usb usb1-port1: cannot reset (err = -32) > [ 3.530828] usb usb1-port1: cannot reset (err = -32) > [ 3.536089] usb usb1-port1: cannot reset (err = -32) > [ 3.541600] usb usb1-port1: cannot reset (err = -32) > [ 3.546857] usb usb1-port1: cannot reset (err = -32) > [ 3.551982] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? > [ 3.560302] usb usb1-port1: cannot reset (err = -32) > [ 3.565566] usb usb1-port1: cannot reset (err = -32) > [ 3.571011] usb usb1-port1: cannot reset (err = -32) > [ 3.576266] usb usb1-port1: cannot reset (err = -32) > [ 3.581769] usb usb1-port1: cannot reset (err = -32) > [ 3.586780] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? > [ 3.594138] usb usb1-port1: cannot reset (err = -32) > [ 3.599615] usb usb1-port1: cannot reset (err = -32) > [ 3.604871] usb usb1-port1: cannot reset (err = -32) > [ 3.610244] usb usb1-port1: cannot reset (err = -32) > [ 3.615499] usb usb1-port1: cannot reset (err = -32) > [ 3.620649] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? > [ 3.627989] usb usb1-port1: cannot reset (err = -32) > [ 3.633370] usb usb1-port1: cannot reset (err = -32) > [ 3.638617] usb usb1-port1: cannot reset (err = -32) > [ 3.644171] usb usb1-port1: cannot reset (err = -32) > [ 3.649546] usb usb1-port1: cannot reset (err = -32) > [ 3.654557] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? > [ 3.661650] usb usb1-port1: unable to enumerate USB device > > And the only way to get the USB port working again is to remove the > USB stick and reboot the board. > i did some tests with a IMX233-Olinuxino Maxi and external 4 port usb hub, but i can't reproduce the problem. Could you provide more information about the hub? I think we don't know that the issue comes really from the mx28 instead of the hub. Best regards Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
