[sane-devel] Brother DCP-J315W

[Ralph Little]

Hi,
Looks like moving the .so files is what did the trick. I have heard of
other people having this problem.
Ubuntu (and a few others I think) changed the location of their platform
specific shared objects some years ago. Brother's installation package most
likely pre-dates this so isn't setup to cope with this specific change.

So, I missed it when you said that it was now working. 😅
Good to get a result. Some answers below though:

On Thu, May 15, 2025 at 2:55 AM David Brown <davown2000.db at gmail.com> wrote:

> Hi Ralph,
>
> I had a go att eh 3 queries you raised:
>
> 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.
>
> >> My system did not recognise ldd command so I didn't push it further.
>

OK, I thought it was installed by default. My mistake. :(

>
> 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.
>
> >> This was all good as per attached pic.  But did not mention the .so
> files.
>

Looks from the attached picture that you used lowercase for SANE_DEBUG_DLL.
It is case dependent, so must be uppercase. You should have seen a load of
diag output.

>
> 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.
>
> >> My system has file: /etc/sane.d/dll.conf    (not the other file
> dll.conf.d)
> This file contained mentions of brother and brother3
>

Yeah, brother3 is what you are looking for, but you say it works now so I
would expect that. 👍

>
> Cheers
> David
>
> On Thu, May 15, 2025 at 8:55 AM Ralph Little <skelband at gmail.com> wrote:
>
>> 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
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://alioth-lists.debian.net/pipermail/sane-devel/attachments/20250515/ed8ea944/attachment.htm>