[sane-devel] UMax PowerLook 2100XL under OpenBSD, still

[m. allan noah]

On Thu, 8 Jun 2006, Alan Corey wrote:

> I had made an initial post, then posted a debug run which ended up in a
> different thread because I subscribed in digest mode initially so I couldn't
> reply.  Anyway, I saw a tiny bit of activity on my debug file in my Apache
> logs, but I don't really know who looked and I haven't heard anything.

i looked at your logs, but i do not know enough about *bsd or umax backend 
to be of much help.

>
> To recap, it looks like I need to set "option scsi-buffer-size-min 32768" to
> something bigger.  I'm seeing errors like "ERROR: too small scsi buffer (32768
> bytes) to send gamma data" and "ERROR: scsi buffer is to small for one shading
> line, calibration aborted" and "scanimage: sane_start: Out of memory"
>
> When I try to increase the scsi-buffer min size even to 33768 though, I get
> "ERROR: sane_start: umax_scsi_open_extended returned too small scsi buffer"
> then "scanimage: sane_start: Out of memory".  With this value increased it
> won't even start the calibrate (the scanner never moves).
>

this indicates that sane was unable to request that the os scsi driver 
provide a big enough buffer. dont know how you ask an openbsd scsi devel 
to look at it. you could try running (with the larger buffer size)

SANE_DEBUG_SANEI_SCSI=255 scanimage...

and read sanei_scsi.c to see if you can get some hints.

i wonder if line 281 is your issue:

# define MAX_DATA       (32*1024)

allan

> With the 32768 value I can scan a small area of RGB data successfully, or do a
> full gray-scale or lineart scan.  At some point though I don't have memory
> enough for a larger RGB scan.  I'm not sure how to change this.  The operating
> system is OpenBSD 3.8, the SCSI card is an Adaptec 2940u.
>
> So, the files:
>
> At http://128.119.200.7/debug.txt is the result of doing a small area RGB scan
> which worked. (scanimage -v --resolution=300 -y 100 -x 100 > test1.pnm
> 2>debug.txt)
>
> At http://128.119.200.7/debug2.txt is the result of a larger area that didn't
> work (scanimage -v --resolution=300 -y 200 -x 200 > test1a.pnm 2>debug2.txt)
>
> At http://128.119.200.7/debug3.txt is the result of setting option
> scsi-buffer-size-min to 33768 and trying the larger scan again.
>
> My umax.conf file is at http://128.119.200.7/umax.conf if that might be of use,
> and there is mention of an Astra 2200 on USB in there because I also have one
> of those.  I don't have it here though, so I haven't tried it on SCSI (lately,
> on this machine).
>
>  Alan
>
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