[sane-devel] Brother DCP-J315W

[Ralph Little]

Hi,

On Wed, May 14, 2025 at 3:47 PM David Brown <davown2000.db at gmail.com> wrote:

> Hi Ralph,
>
> Thanks for getting back to me.  After I submitted my query I re-checked my
> notes and tweaks from past 6 installs and found my scanner now works after
> I re-copied files as follows:
> sudo cp /usr/lib64/sane/libsane-brother* /usr/lib/x86_64-linux-gnu/sane
>

This is an Ubuntuism. They just path their platform-specific binaries in a
different place.


>
> This command copied 3 new files across.  There were 6 libsane-brother
> files already but not the missing 3 which are listed below and scanner now
> working (previous error message was "Missing Drivers").
> The three new files this copy command copied were:
> libsane-brother1.so
> libsane-brother1.so.1.0.7
> libsane-brother2.so.1.0.7
>
> I don't what the difference is between these three files or which one or
> combination worked.
> I don't know why the missing 3 files were not previously copied???  I had
> run this command before but may have had a syntax error - hard to say.
> It's all a mystery to me.
>
> The above solution is but part of a sequence of tweaks I used on 24.04.1
> based on past years.
> Basically - whenever I blow up my system and need a fresh install.  It
> happens lol.
>
> Other tweaks include:
>
> Edit 60-libsane1.rules 		cmd: sudo nano //usr/lib/udev/rules.d/60-libsane1.rules			# Brother scanner			ATTRS{Vendor}==”04f9”, ENV{libsane_matched}=”yes”
>
> sudo mkdir //usr/lib/sane
>
> sudo cp /usr/lib64/sane/libsane-brother* /usr/lib/sane
>
> In 2022 Brother suggested installing USB patch file (google Brother legacy USB)
>
> dpkg-i brotherlegacyusb-1.1.0-0.all.deb
>
>
Probably would be the same as the other tip I replied about related to
libusb.

>
> On 17/3/25 I edited /usr/lib/udev/hwdb.d/20-sane.hwdb and added:
>
> usb:v04f9p0254*
>
> libsane-matched=yes
>
>
> 13/4/25 I tried installing libusb but this was already the latest version.
>
> sudo apt-get install libusb-0.1-4
>
> OK, gotcha.

So, a few things to try:

1) Try the ldd command with each of the 3 libbrother* files and make sure
it can resolve all the dependencies.

2) SANE_DEBUG_DLL=5 scanimage -L
...and look at the output. Make sure that the brother driver is mentioned
and that it says that it can find and load the .so files.

3) The brother backend should be mentioned somewhere in
/etc/sane.d/dll.conf /etc/sane.d/dll.conf.d or somesuch IIRC.
Perhaps check that they are.

Let us know what you discover.

Cheers,
Ralph
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