Attachment 156852 Details for Bug 206094 – Mail to sane-avision list

Mail to sane-avision list

avision_msg (text/plain), 1.71 KB, created by Kevin R. Page on 2007-06-13 07:43:14 UTC

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Creator: Kevin R. Page

Created: 2007-06-13 07:43:14 UTC

Size: 1.71 KB

patch

obsolete

>
>On Thu, 2007-01-18 at 11:30 +0000, Kevin Page wrote:
>> I'm going to hack the latest release to set dpi_range.min to 100 and
>> test that - I'll get back to you once I've confirmed this is the
>> source
>> of the problem. 
>
>Some progress!
>
>I took the sane-backends-1.0.18 in Fedora (debug shows it's Build 201)
>and changed it so that the default value of dpi_range.min is 100. Using
>this with xsane:
>
>- gray preview scan works fine
>- colour preview scan doesn't work: the head hardly moves, and the
>"scan" has a yellow hue
>- gray full scan is dark (white page background was gray)
>- colour full scan is fine
>
>
>I then patched the release with your current svn versions (r388), and
>applied the same default dpi_range.min of 100:
>
>- gray preview scan works fine
>- colour preview scan doesn't work: again, the head doesn't move, but
>this time the hue is blue
>- gray full scan is perfect!
>- colour full scan is as though it's through a blue filter
>
>As an aside, using r388 take a lot longer to start up - detection seems
>much slower?
>
>So, in summary:
>1) setting dpi_range.min to 100 fixes the gray preview scan so that it
>works [1]
>2) gray full scan works fine in r388 (but is too dark in the earlier
>build)
>3) colour full scan worked fine in Build 201, but has a blue hue in r388
>
>4) colour preview scan is still broken - does it rely on a variable
>other than dpi_range.min? The behaviour seems outwardly similar to that
>of the gray preview scan before changing dpi_range.min.
>
>
>[1] dev->inquiry.asic_type is reported as 5, i.e. AV_ASIC_C5.
>
>
>I hope this allows you to create a patch to set a more appropriate value
>of dpi_range.min for the 5370C. Let me know if you have any ideas as to
>what I could try to fix the colour preview, too.
>
>Best regards,
>
>Kev

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