Just tried that with no luck.  Thanks for the tip though.

-- Leon

On 07/28/2017 08:32 PM, m. allan noah wrote:
You might try sane-backends 1.0.27, which includes the following
statement in its release notes:

Note 3: The Linux USB3 workaround which was added in version 1.0.25 is
now disabled by default. If you have difficulty using a scanner which
previously worked, or intermittent scanner availability, try setting
the new environment variable SANE_USB_WORKAROUND=1 before starting
your frontend.

On Fri, Jul 28, 2017 at 10:02 PM, Leon Hauck <l...@progcpu.net> wrote:
TLDR: are there any known issues using a Nikon Coolscan IV ED with
libusb 0.1.12-30 and kernel 4.9.0?

---------------------------------------

I'm trying to get an Coolscan IV ED (LS40) to work with Debian Stretch
(current stable release).

scanimage -L

properly identifies the scanner, however

scanimage > testme.pnm

hangs and eventually errors out due to an i/o error.

I connected this scanner to a laptop running the same software with the same
results.

I connected the scanner to an older laptop running Debian Jessie (previous
stable release), and it works fine, and I can also pass along additional
command line arguments for white balance, auto-focus, etc.

I'm guessing something may have changed in libusb and/or the kernel, which
is preventing communication with this older USB1.1 unit.

Are there any known issues with this setup?

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