[sane-devel] epson 1660 scan resolution questions

[Jerry Sievers]

Karl Heinz Kremer <khk at khk.net> writes:

karl, thanks again.  

i'm going to plan a total OS upgrade soon.  for now, here are the two
scanner driver files you are referring to;

http://www.jerrysievers.com/.scannerSource/

i see in those files #defines for a NAK timeout.  maybe this can be
changed to help temporarily.

please advise.


> I cc'ed this message to the mailing list. Please always reply to the  
> list as well.
> 
> When I first replied, I did not realize how ancient 2.2.17 is :-) Back  
> then, USB
> support in the stock kernel was marginal, and people usually used the  
> 2.4
> backport. Unfortunately I don't have any 2.2.x kernel source on my  
> system
> anymore - never thought I would need it again.
> 
> Can you send me the files scanner.c and scanner.h from your source tree?
> 
> If not, does anybody on the list still have a Red Hat 2.2.17-8 source  
> tree?
> Are these files anywhere on the Internet? I was not able to find a  
> source
> package for the Red Hat kernel.
> 
> Karl Heinz
> 
> 
> On Sunday, November 16, 2003, at 02:31 PM, Jerry Sievers wrote:
> 
> > hi karl and thanks for the quick reply.
> >
> > 2.2.17-8 is the kernel version.
> >
> > this is my production workstation and it's setup with speech synthesis
> > so, i have to be careful not making radical changes to this box.  a
> > recent upgrade of glibc went ok but was very carefully planned.
> >
> > i have impaired vision, can see the screen and graphics but text is
> > not clear enough to read directly.
> >
> > i will try setting up a spare machine with a newer linux to see if
> > this works better.
> >
> > usb_control/bulk_msg: timeout
> >
> > i think this line from kernel log is what you are referring to as
> > possibly causing the problem.
> >
> > yes, i would rather try compile the kernel module first and see if
> > this helps.
> >
> > in the meantime, i am very happy that it's working this well now and
> > without much configuration time.
> >
> > please do offer a suggestion to me about where the kernel module
> > source code might be tuned.  i suppose this timeout parm can't be
> > changed by writing into /proc somewhere.  too bad about that.
> >
> > thanks.
> >
> >
> >
> > Karl Heinz Kremer <khk at khk.net> writes:
> >
> >> Jerry,
> >>
> >> the list of available resolutions gets reported by the scanner. So if
> >> you
> >> see resolutions up to 3200 dpi, the scanner can actually support all
> >> of them.
> >>
> >> Your kernel is relatively old, and the timeout problem is a known
> >> problem -
> >> even though it's more likely to occur when you can using a  
> >> transparency
> >> unit.
> >>
> >> If you cannot update your kernel, you can modify a timeout value in
> >> the scanner.c source file. Which kernel version are you using exactly?
> >> With this information I may be able to tell you which line to change.
> >>
> >> Karl Heinz
> >>
> >>
> >> On Sunday, November 16, 2003, at 11:24 AM, Jerry Sievers wrote:
> >>
> >>> hi.  a few days ago i got an epson 1660 and compiled sane backends
> >>> 1.0.13-pre2.  setup the modules.conf file with vendor and product ID
> >>> info as such;
> >>>
> >>> options scanner vendor=0x04b8 product=0x011e
> >>>
> >>> this is on linux redhat 7.0 w/kernel 2.2.
> >>>
> >>> scanimage --help reports resolutions up to 3200 DPI.
> >>>
> >>> setting anything higher than 600 for mode color or 800 for mode  
> >>> binary
> >>> causes the scanning to hang and an IO error reported by scanner.c.
> >>> eg;
> >>>
> >>> usb_control/bulk_msg: timeout
> >>> scanner.c: read_scanner(0): funky result:-32. Please notify the
> >>> maintainer.
> >>>
> >>> please, wondering what to expect from this scanner and if there's a
> >>> problem with higher resolutions scans or just a bug in the reporting
> >>> of this model's capabilities.
> >>>
> >>> i am legally blind and not able to read the specs from the paperwork
> >>> supplied with the scanner for a better idea of what's supported.
> >>>
> >>> general purpose scanning seems fine.
> >>>
> >>> great job sane developers!
> >>>
> >>>
> >>> --   
> >>> --------------------------------------------------------------------- 
> >>> --
> >>> --------
> >>> Jerry Sievers   305 854-3001 (home)     Unix Administrator/Consultant
> >>>                 305 321-1144 (mobile	http://www.JerrySievers.com/
> >>>
> >>> -- 
> >>> sane-devel mailing list: sane-devel at lists.alioth.debian.org
> >>> http://lists.alioth.debian.org/mailman/listinfo/sane-devel
> >>> Unsubscribe: Send mail with subject "unsubscribe your_password"
> >>>              to sane-devel-request at lists.alioth.debian.org
> >>
> >
> > -- 
> > ----------------------------------------------------------------------- 
> > --------
> > Jerry Sievers   305 854-3001 (home)     Unix Administrator/Consultant
> >                 305 321-1144 (mobile	http://www.JerrySievers.com/
> 

-- 
-------------------------------------------------------------------------------
Jerry Sievers   305 854-3001 (home)     Unix Administrator/Consultant
                305 321-1144 (mobile	http://www.JerrySievers.com/