[sane-devel] Can't Change Brightness/Contrast
SvenSeiffert at gmx.net
Sat Nov 14 14:43:00 GMT 2020
Since updating from Kubuntu 20.04 to Kubuntu 20.10, I have lost the
ability to alter brightness and contrast when scanning with a CanoScan
My sane-utils version is 1.0.31-2ubuntu0.20.10.
I initially noticed the problem when using gscan2pdf as frontend and
changing the contrast/brightness settings on the Enhance tab had no
effect on the resulting scans.
The developer suggested producing two scans from the command line, using
'scanimage --brightness=-100 > min.pnm' and 'scanimage --brightness=100
Both outputs are identical, which, as I understand, indicates a problem
with the backend.
I was hoping someone might be able to point me in the right direction to
solve this issue.
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