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

[Thierry HUCAHRD]

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"