Public bug reported:
This problem is 100% reproducable, also across reboots.
On a Ubuntu 16.04 and 17.04 and Windows7 system the Scanner CanoScan
Lide 200 works still completely fine.
Problem with Ubuntu 17.10 :
In a horizontally centered zone of about 1 centimeter width of the scan
surface, over the full height of the surface, estimated 90% of the pixel values
are completely wrong.
The distribution of the wrong pixels in this zone appears random.
With lineart and gray scan, the wrong pixels are black. With color scan, the
wrong pixels are black or similar to red. The other pixels in the zone are a
bit too bright. The effect is the same at all resolutions. See attached example
snippets. The effect would continue vertically over the entire scan surface.
The original was uniformly colored.
The scanner worked again with Ubuntu 17.10 after purging sane-
utils,libsane1,libsane-common (by overriding dependency-errors) and
installing libsane-common_1.0.25+git20150528-1ubuntu4_all.deb
libsane_1.0.25+git20150528-1ubuntu4_amd64.deb sane-
utils_1.0.25+git20150528-1ubuntu4_amd64.deb (again by overriding
dependency-errors) (and maybe re-plug scanner / reboot)
Trying these versions had the same problem as default Ubuntu 17.10:
archive.ubuntu.com : 1.0.27-1~experimental2ubuntu2.1,
launchpad.net/~rolfbensch/+archive/ubuntu/sane-git : 1.0.27+git20171012-artful0
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: libsane1 1.0.27-1~experimental2ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Oct 31 20:48:39 2017
InstallationDate: Installed on 2015-12-31 (670 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: sane-backends
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: sane-backends (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful
** Attachment added: "snippet of wrong scan. the effect would continue
vertically over entire scan surface, and similar also bw and gray scans
(affected pixels black)"
https://bugs.launchpad.net/bugs/1729077/+attachment/5001380/+files/color_speckle.jpg
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https://bugs.launchpad.net/bugs/1729077
Title:
wrong color of horizontally centered area of scan with CanoScan Lide
200
Status in sane-backends package in Ubuntu:
New
Bug description:
This problem is 100% reproducable, also across reboots.
On a Ubuntu 16.04 and 17.04 and Windows7 system the Scanner CanoScan
Lide 200 works still completely fine.
Problem with Ubuntu 17.10 :
In a horizontally centered zone of about 1 centimeter width of the scan
surface, over the full height of the surface, estimated 90% of the pixel values
are completely wrong.
The distribution of the wrong pixels in this zone appears random.
With lineart and gray scan, the wrong pixels are black. With color scan, the
wrong pixels are black or similar to red. The other pixels in the zone are a
bit too bright. The effect is the same at all resolutions. See attached example
snippets. The effect would continue vertically over the entire scan surface.
The original was uniformly colored.
The scanner worked again with Ubuntu 17.10 after purging sane-
utils,libsane1,libsane-common (by overriding dependency-errors) and
installing libsane-common_1.0.25+git20150528-1ubuntu4_all.deb
libsane_1.0.25+git20150528-1ubuntu4_amd64.deb sane-
utils_1.0.25+git20150528-1ubuntu4_amd64.deb (again by overriding
dependency-errors) (and maybe re-plug scanner / reboot)
Trying these versions had the same problem as default Ubuntu 17.10:
archive.ubuntu.com : 1.0.27-1~experimental2ubuntu2.1,
launchpad.net/~rolfbensch/+archive/ubuntu/sane-git : 1.0.27+git20171012-artful0
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: libsane1 1.0.27-1~experimental2ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Oct 31 20:48:39 2017
InstallationDate: Installed on 2015-12-31 (670 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: sane-backends
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1729077/+subscriptions
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