[PLUG] Xsane Does Not Find Scanner

[King Beowulf]

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