Hey Gunnar,

Thanks so much for picking this up! I attempted the mentioned pre-
verification on a relatively fresh 19.04/Disco installation
(specifically: one without any manual changes to the system-installed
sane packages and repositories).

However I got an error that seems to be related to the ppa itself, not
the patch per se. Any directions from here? Thanks!


simon@interbliss:~$ sudo add-apt-repository ppa:gunnarhj/sane-backends
[sudo] password for simon: 
 More info: https://launchpad.net/~gunnarhj/+archive/ubuntu/sane-backends
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Hit:1 http://at.archive.ubuntu.com/ubuntu disco InRelease
Hit:2 http://at.archive.ubuntu.com/ubuntu disco-updates InRelease              
Hit:3 https://deb.nodesource.com/node_12.x disco InRelease                     
Hit:4 http://at.archive.ubuntu.com/ubuntu disco-backports InRelease            
Ign:5 http://ppa.launchpad.net/gunnarhj/sane-backends/ubuntu disco InRelease   
Hit:6 http://ppa.launchpad.net/obsproject/obs-studio/ubuntu disco InRelease    
Hit:7 http://security.ubuntu.com/ubuntu disco-security InRelease               
Err:8 http://ppa.launchpad.net/gunnarhj/sane-backends/ubuntu disco Release
  404  Not Found [IP: 80]
Hit:9 https://packagecloud.io/AtomEditor/atom/any any InRelease       
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/gunnarhj/sane-backends/ubuntu disco 
Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore 
disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration 

You received this bug notification because you are a member of Desktop
Packages, which is subscribed to sane-backends in Ubuntu.

  genesys_gl847 scanners produce a black band in scanned images on
  Ubuntu 17.10+,  18.04 LTS and 18.10 Cosmic cuttlefish

Status in sane-backends:
Status in sane-backends package in Ubuntu:
  In Progress
Status in sane-backends source package in Bionic:
  In Progress
Status in sane-backends source package in Disco:
  In Progress
Status in sane-backends package in Debian:

Bug description:

  When using a Genesys GL847 scanner, the documents get disfigured by a
  discolored bar. The proposed uploads should fix the issue. They are
  available in this PPA:


  [Test case]

  1. Install the libsane (libsane1 in bionic), libsane-common
     and sane-utils packages from {bionic,disco]-proposed.

  2. Use an affected device to scan, and find that the issue is
     no longer present.

  [Regression risk]

  Upstream commit, focused bug fix => low regression risk

  [Original description]

  On Windows it works but on my Ubuntu 17.10, 18.04 and 18.10 I see a
  black band on scanned image. The scanner is Canon CanoScan LIDE100.
  Libsane version is 1.0.27-1~experimental2ubuntu1

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