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

[m. allan noah]

>> 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 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