Ubuntu: Problem with scanner Canoscan LiDE 120, image is black, ubuntu 16.04


The scanner is working correctly under windows and is detected correctly under ubuntu 16.04.

I was expecting this link CanoScan LiDE 120 on Ubuntu 16.04: Scan completely black to solve the problem as my symptoms seem to be exactly the same as given there but it hasn't worked.

For the first command I got this, pressing ENTER to continue where told, I'm not sure what the keyring etc means, did it work?

alex@alex-16:~$ sudo add-apt-repository ppa:rolfbensch/sane-git   Ubuntu SANE packages from SANE daily git snapshots (http://www.sane-project.org/snapshots/).    Unchanged SANE daily git snapshots are ignored!    Please send scanner related questions to the SANE mailing list <email address hidden>.    If you need the last released scanner driver, you can use my other PPA: https://launchpad.net/~rolfbensch/+archive/ubuntu/sane-release.   More info: https://launchpad.net/~rolfbensch/+archive/ubuntu/sane-git  Press [ENTER] to continue or ctrl-c to cancel adding it    gpg: keyring `/tmp/tmpxabubqvw/secring.gpg' created  gpg: keyring `/tmp/tmpxabubqvw/pubring.gpg' created  gpg: requesting key B7CC8701 from hkp server keyserver.ubuntu.com  gpg: /tmp/tmpxabubqvw/trustdb.gpg: trustdb created  gpg: key B7CC8701: public key "Launchpad PPA for Rolf Bensch" imported  gpg: Total number processed: 1  gpg:               imported: 1  (RSA: 1)  OK  alex@alex-16:~$  

After this I entered "sudo apt-get update" as instructed and this seems ok. Because it contains more than 8 links I was told I couldn't post all of it.

alex@alex-16:~$ sudo apt-get update  Hit:1 http://ppa.launchpad.net/atareao/telegram/ubuntu xenial InRelease  Hit:2 http://archive.canonical.com xenial InRelease                                                                                          ......  Hit:10 http://ppa.launchpad.net/rolfbensch/sane-git/ubuntu xenial InRelease                                                                  Hit:11 https://repo.skype.com/deb stable InRelease                                                                                           Hit:12 http://ppa.launchpad.net/videolan/stable-daily/ubuntu xenial InRelease                                                           Hit:13 http://dl.google.com/linux/chrome/deb stable Release  Fetched 306 kB in 0s (347 kB/s)  Reading package lists... Done  alex@alex-16:~$  

After this my symptoms were not changed and I'm not sure what to try next.

Well, anyway, thanks for any help.


That keyring stuff is expected when you add the ppa.

When you did sudo apt-get update, the list of program sources is refreshed, but no actual updates are done.

To actually incorporate the updates from the ppa, you must do sudo apt-get upgrade

Once you do that, as of today, if you do an apt-cache policy libsane and see this in the first line of the results

Installed: 1.0.27+git20171029-xenial0

then you will have indeed installed the latest software from that ppa.

I can't tell if this will actually help your problem, but there is a good chance it will. It helped with our Canon scanner problems.

Note: It is possible that your question should be closed as a duplicate of the one you mention. I'm choosing to interpret it instead as a question about you having difficulty incorporating the solution found in that question's answer.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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