[sane-devel] Canon on Raspberry Pi

[Sean Greenslade]

On May 15, 2020 11:30:30 AM PDT, Mac Goever <macgoever at gmail.com> wrote:
>Hoi,
>
>forgot an essential info: The hardware is a Pi 3 Ver 1.2 Hardware
>Revision: a02082
>
>On Fri, May 15, 2020 at 8:08 PM Mac Goever <macgoever at gmail.com> wrote:
>>
>> Hi everyone,
>>
>> as I read one can get support on this Mailinglist, I shall give it a
>> shot with my setup.
>> I have a running raspbian (Buster / 10 / PI 3B+) with all packets
>> upgraded every 24h.
>>
>> Sane Version is:
>> --
>> scanimage -V
>> scanimage (sane-backends) 1.0.27; backend version 1.0.27
>> --
>>
>> When connecting a Canon LiDE 120, sane-find-scanner gives me:
>> --
>> [...]
>> found USB scanner (vendor=0x04a9 [Canon], product=0x190e [CanoScan])
>> at libusb:001:008
>> [...]
>> --
>> which is stable over hours and days.
>>
>> Problem occurs with scanimge -L. About 10 seconds after pugging in
>the
>> scanner, the device gets detected:
>> --
>> device `genesys:libusb:001:008' is a Canon LiDE 120 flatbed scanner
>> --
>> After these ~10 seconds it disappears and does not come back.
>> unplugging it and replugging gives another 10 seconds.
>>
>> I suspected a power issue, because the LiDE 120 draws it's power via
>> USB. Unfortunately using a powered hub or a 10Amp power supply does
>> not change anything. The scanner works without a problem connected to
>> an Ubuntu notebook with the same sane Version. Tested with USB Hub
>and
>> without.
>>
>> I already addressed this problem in the IRC and a friendly idler
>> reproduced the issue.
>>
>> Thanks for any efforts
>>
>> Martin

Can you show the dmesg output from when you first plug the scanner in until after the scanimage command completes?

--Sean