[sane-devel] Canon on Raspberry Pi

[Mac Goever]

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