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

[Darrell Styner]

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.

>
>
>>
>>
>>>> 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