[sane-devel] Simple Scan on Ubuntu 20.04 with Canon Pixma TR4540

[Ralph Little]

Hi,
Actually, I just saw the screenshot attachments and I notice that the 
"apt upgrade" installed the new version of libsane which would have 
included the updates.
Adding the repo and doing "apt update" just pulls down the repository 
information, but does not perform any upgrade operations.
The "apt upgrade" does that, so that is probably what did the trick.

If you were running simple-scan while the upgrade was being performed, 
you would not see the effect of the upgrade until you restarted 
simple-scan, as it would have been holding on to the previous version of 
the libsane backends.

Cheers,
Ralph

On 2020-05-18 9:19 a.m., Lucy Dixon Hendry wrote:
>
> Hurrah!  Gentlemen, you have saved my life.  I'm not sure which of 
> these saved the day, but suddenly the scanner is showing two versions 
> of the printer, and the second version now scans.
>
> Thank you so much.
>
> All the best
>
> Lucy
>
>
> *Lucy Dixon Hendry*
> *Admin Empress* |///Virtual Assistant, Social Media Marketing, Website 
> Design/*/
> /***
> /Phone: /+27 (0)82 5581 702/
> E-mail: /lucy at adminempress.com <mailto:lucy at adminempress.com>
> /Facebook:/ LFD PR <http://www.facebook.com/lucyfdixonPR>
> //
>
> On 2020/05/18 5:31 pm, Thierry HUCAHRD wrote:
>> Le 2020-05-18 17:10, Ralph Little a écrit :
>>> Hi Lucy,
>>> Sorry to hear that you are still having issues with this device. :(
>>>
>>> On 2020-05-18 2:55 a.m., Lucy Dixon Hendry wrote:
>>>
>>>> Hi Ralph & Thierry & co
>>>>
>>>> Thank you for getting back to me. I have run the following commands
>>>> as suggested:
>>>>
>>>>> apt update
>>>>> apt install libsane libsane-common sane-utils
>>>>
>>>>> sudo apt upgrade
>>>>
>>>> But I'm still getting exactly the same response from Simple Scanner
>>>> - it sees the printer, but when I attempt to scan is says scanner
>>>> not connected.
>>>>
>>>> I'm at my wits end! Any more suggestions?  I have multiple page
>>>> documents to scan.
>>>
>>> OK, I have a few suggestions to see what is going on here.
>>>
>>> Firstly, if this is a new scanner to you, I would check that the
>>> scanner does not require you to select some mode on the device itself
>>> to enable remote scanning.
>>> I have a Canon multi-function machine here (imageClass MF4770n) and in
>>> order to do scanning, I have to set it into "Remote Scanning" mode
>>> using the control panel, otherwise, I get exactly the same error as
>>> you, although the error is pretty generic.
>>>
>>> Secondly, I assume that you are using the ADF at the moment. Could you
>>> attempt a scan on the flatbed area and let us know if this works?
>>> The reason I ask is that the pixma backend has problems with a number
>>> of newer Pixma machines and this would at least determine that SANE is
>>> talking the right language and getting through to the device
>>> sufficiently to have a conversation. Also, while clunky and awkward
>>> compared to the ADF, you might be able to get some work done.
>>>
>>> Thirdly, perhaps you could type the following in a terminal window:
>>>
>>> SANE_DEBUG_PIXMA=50 SANE_DEBUG_ESCL=50 SANE_DEBUG_DLL=10 simple-scan
>>>> pixma.out 2>&1
>>>
>>> ...and try to perform an ADF scan. This should generate some
>>> informative information about the escl and pixma backends, the things
>>> that are being loaded.
>>> Then attach the pixma.out file that is generated to a reply here.
>>>
>>> Hopefully, we can get you going.
>>>
>>> Cheers,
>>> Ralph
>>
>> Did you choose the "single-source" in simple-scan ?
>> I noticed that it defaults to "All pages From Feeder"

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