[sane-devel] Xsane can't find scanner - again, but this one is USB

[Gernot Hassenpflug]

> On Thu, Oct 29, 2015 at 11:32 PM, MR ZenWiz <mrzenwiz at gmail.com> wrote:

Hi,
Does your computer have a USB3 port and are you using it? Or does it
have standard older USB2 ports only? Not sure what the "3.0 root hub"
means.
USB3 and linux have some troubles, and you'll need to work around this
I think, for now, see the mailing list for this.
Note: SANE and CUPS have nothing to do with one another.
Regards,
Gernot Hassenpflug

>> I plugged in my Canon LiDE scanner and it shows up on lsusb:
>>
>> mar at marbase:~ $ lsusb
>> Bus 002 Device 002: ID 8087:8001 Intel Corp.
>> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 001 Device 002: ID 8087:8009 Intel Corp.
>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>> Bus 003 Device 008: ID 04a9:220e Canon, Inc. CanoScan N1240U/LiDE 30
>> Bus 003 Device 002: ID 04f9:0040 Brother Industries, Ltd
>> Bus 003 Device 005: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
>> Bus 003 Device 006: ID 413c:2011 Dell Computer Corp. Multimedia Pro Keyboard
>> Bus 003 Device 004: ID 413c:1005 Dell Computer Corp. Multimedia Pro Keyboard Hub
>> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>
>> xsane hung after this.  I unplugged the scanner and plugged the HP
>> back in, and the Canon showed up in xsane, but of course it didn't
>> work.  I switched the cable back, and xsane hung again.  So I ran
>> sane-find-scanner:
>>
>> mar at marbase:~ $ sudo sane-find-scanner
>> [sudo] password for mar:
>>
>>   # sane-find-scanner will now attempt to detect your scanner. If the
>>   # result is different from what you expected, first make sure your
>>   # scanner is powered up and properly connected to your computer.
>>
>>   # No SCSI scanners found. If you expected something different, make sure that
>>   # you have loaded a kernel SCSI driver for your SCSI adapter.
>>
>> found USB scanner (vendor=0x04a9 [Canon], product=0x220e [CanoScan])
>> at libusb:003:008
>>   # Your USB scanner was (probably) detected. It may or may not be supported by
>>   # SANE. Try scanimage -L and read the backend's manpage.
/../
>> On Thu, Oct 29, 2015 at 11:12 PM, MR ZenWiz <mrzenwiz at gmail.com> wrote:
/../
>>> At home, I run Xubuntu 14.04.3 with an HP 5740 all-in-one attached on
>>> the USB (bus 3, device 14).
>>>
>>> When I first installed this it was fine, everything worked.
>>>
>>> Tonight I tried to scan a document, and xsane can't find the
>>> scanner/printer/etc.
/../