[sane-devel] Install problem with fi-4120C2 under FreeBSD and OS X 10.4.2

[m. allan noah]

On Wed, 2 Nov 2005, Darrell Styner wrote:

>
> On Nov 2, 2005, at 6:48 AM, m. allan noah wrote:
>
>>>> 1. no thats not normal, but it may be caused by lamp warm-up or some 
>>>> such. need more debug log info of what is going on during that pause.
>>>> 
>>> 
>>> I don't think it's warm-up. The scanner's always ready to go right away 
>>> under Windows and the delay is the same when you run one scanimage right 
>>> after another. I'll send you a debug log soon.
>>> 
>> 
>> judging from the logs you sent, it is something about the DATA0/1 usb 
>> toggle again. since almost all these transactions involve a single write 
>> and 2 reads, i am surprised that it acts stupid on the second read, but not 
>> the first. the fi-4120c just locks up at this point. the 4120c2 self-resets 
>> the toggle after 30 seconds, i think (its not documented).
>> 
>> i think a retry on the second read might fix that, i will code it up and 
>> send you a patch.
>
> Thanks, I look forward to the patch.
>
> I've got this scanner on eval right now and can send it back and try another 
> if there's something similar that's known to play nicer with sane. I'm going 
> to be integrating this into a commercial product and need it to be rock 
> solid. This intermittent read problem is shaking my confidence a bit. Do you 
> know of another USB, ADF scanner in the 1K price range that might be a better 
> choice in terms of sane compatibility? I've looked carefully at the 
> "supported devices" list but don't see many mid-level, ADF scanners that are 
> currently sold and supported.

honestly, these scanners are great, and i know a great deal about how to 
program them (my company owns ~250 4120C/4120C2/5110C scanners, running a 
proprietary libusb app on headless linux boxes) so the difficulties with 
sane are pretty much entirely my fault for not having time to sit down and 
really fix it.

that said, the vertical paper path of these units does leave a bit to be 
desired, and i have been thinking of looking at some of the panasonic usb 
units that have the laser-jet like paper path. i cannot comment on their 
sane support.

allan

>
>> 
>> 
>>> 
>>> 
>>>>> Thanks for the help,
>>>>> 
>>>> its not a good long-term fix, so be prepared to test something more 
>>>> permanent later...
>>>> 
>>> 
>>> I'll be happy to test anything as long as it's in the next 29 days. After 
>>> that I may lose access to the scanner.
>>> Am I losing any features by having that line commented out?
>>> 
>>> 
>> 
>> later model fujitsu scanners can do monochrome scans using any one of the 
>> three color heads. default is green. this is useful for dropout of color 
>> printed forms or losing editors marks, etc. older scanners you have to 
>> change to a colored lamp. having that line commented is no worse than it 
>> not working, like it was before :) if you did want to specify the color, 
>> you could not do it til this code is fixed.
>> 
>> allan
>> 
>> 
>>> Thanks again.
>>> 
>>> 
>>>> allan
>>>> 
>>>>> On Nov 1, 2005, at 10:53 AM, m. allan noah wrote:
>>>>> 
>>>>>> as a test, could you try modifying backend/fujitsu.c, recompile and 
>>>>>> re-install sane backends? i want to see if this fixes the problem...
>>>>>> around line 3673, you should see:
>>>>>> if (s->has_dropout_color)
>>>>>> change that to
>>>>>> if(0)
>>>>>> allan
>>>>>> On Tue, 1 Nov 2005, Darrell Styner wrote:
>>>>>> 
>>>>>>> Here it is. Note that the end of the file shows an interrupt where I 
>>>>>>> ^C'd after waiting a couple minutes for it to continue. If I let it go 
>>>>>>> on at this point the log will grow rapidly as it fails trying to write 
>>>>>>> the same 31 bytes to the scanner over and over again.
>>>>>>> Thanks for looking into this.
>>>>>>> 
>>>>>> -- 
>>>>>> "so don't tell us it can't be done, putting down what you don't know.
>>>>>> money isn't our god, integrity will free our souls" - Max Cavalera
>>>>>> 
>>>>> Darrell Styner
>>>>> darrell at avanta.com
>>>>> 
>>>> -- 
>>>> "so don't tell us it can't be done, putting down what you don't know.
>>>> money isn't our god, integrity will free our souls" - Max Cavalera
>>>> -- 
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>>>> 
>>> 
>>> Darrell Styner
>>> darrell at avanta.com
>>> 
>>> 
>>> 
>> 
>> -- 
>> "so don't tell us it can't be done, putting down what you don't know.
>> money isn't our god, integrity will free our souls" - Max Cavalera
>> 
>> 
>
> Darrell Styner
> darrell at avanta.com
>
>
>

-- 
"so don't tell us it can't be done, putting down what you don't know.
money isn't our god, integrity will free our souls" - Max Cavalera