On 06/20/2015 10:18 AM, Rich Shepard wrote: > On Sat, 20 Jun 2015, King Beowulf wrote: > >> check "lsusb" to make sure scanner shows up, try abother usb port. > > Ed, > > Will check 'lsusb' Real Soon Now; only recently thought of the port being > an issue. > > Ever seen a small USB 4-port hub go bad? I suspect that I might have such > an animal here. Two devices don't work with it, but do if plugged into > another USB port; the speakers get their power via that hub and they work. > So power is transmitted but data apparently are not. >
check 'dmesg' for boot errors (/var/log/syslog will have the same entries. I have a bad USB port on the motherboard and every once in a while I forget its bad and plug something in...hours later: "Oh, wait..." $ su -c "dmesg |grep hub" Password: [ 0.210348] usbcore: registered new interface driver hub [ 4.896782] hub 1-0:1.0: USB hub found [ 4.898290] hub 1-0:1.0: 2 ports detected [ 4.966812] hub 2-0:1.0: USB hub found [ 4.968316] hub 2-0:1.0: 2 ports detected [ 4.991249] hub 3-0:1.0: USB hub found [ 4.992469] hub 3-0:1.0: 10 ports detected [ 5.042087] hub 1-0:1.0: USB hub found [ 5.043247] hub 1-0:1.0: 2 ports detected [ 5.093108] hub 2-0:1.0: USB hub found [ 5.094283] hub 2-0:1.0: 2 ports detected [ 5.161400] hub 4-0:1.0: USB hub found [ 5.162586] hub 4-0:1.0: 2 ports detected [ 5.228603] hub 5-0:1.0: USB hub found [ 5.229811] hub 5-0:1.0: 2 ports detected [ 5.295387] hub 6-0:1.0: USB hub found [ 5.296629] hub 6-0:1.0: 2 ports detected [ 8.737028] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 9.699022] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 10.660026] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 11.621022] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 11.622092] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1591.612024] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 1592.572024] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 1593.532021] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 1594.492023] hub 2-0:1.0: Cannot enable port 1. Maybe the USB cable is bad? [ 1594.492035] hub 2-0:1.0: unable to enumerate USB device on port 1 _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
