Simple Scan doesn't load

[Charles]

Simple Scan version 3.28.0-0ubuntu1 fails to load in Ubuntu 18.04 LTS

simple-scan: error while loading shared libraries: libcolord.so.1: cannot open shared object file: No such file or directory

Related to bug# 1869522
https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1869522

Not sure if I should be reporting the bug against Simple Scan, Gnome, or Ubuntu 18.04 LTS.

Gnome project said it's not a bug with Simple Scan. Something about not having the latest version of Gnome bundled with Ubuntu 18.04 LTS.
https://gitlab.gnome.org/GNOME/simple-scan/-/issues/159

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: simple-scan 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-91.92-generic 4.15.18
Uname: Linux 4.15.0-91-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.12
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 28 15:53:47 2020
InstallationDate: Installed on 2014-08-08 (2059 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: MSI MS-7922
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-91-generic root=UUID=12cc7d65-8589-4aab-a77b-566ea7af9984 ro pci=assign-busses quiet splash vt.handoff=1
SimpleScanLog:

SourcePackage: simple-scan
UpgradeStatus: Upgraded to bionic on 2020-01-05 (83 days ago)
dmi.bios.date: 02/16/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.10
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97 U3 PLUS (MS-7922)
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.10:bd02/16/2016:svnMSI:pnMS-7922:pvr1.0:rvnMSI:rnZ97U3PLUS(MS-7922):rvr1.0:cvnMSI:ct3:cvr1.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7922
dmi.product.version: 1.0
dmi.sys.vendor: MSI

[Bartosz Kosiorek (gang65)]

Hi Charles.
I suspect that you have some custom installation of the Simple Scanner.
What is the output of the command:

$ which simple-scan

According to documentation: https://packages.ubuntu.com/bionic/amd64/simple-scan/filelist
it shoule be:

 /usr/bin/simple-scan

Try to run simple-scan from `/usr/bin/simple-scan` location and check if it is working for you.

I also checked and standard installation of the simple-scanner uses correct library:

$ ldd /usr/bin/simple-scan
 linux-vdso.so.1 (0x00007ffebbff5000)
        ...
 libsane.so.1 => /usr/lib/x86_64-linux-gnu/libsane.so.1 (0x00007f0e15100000)
 libcolord.so.2 => /usr/lib/x86_64-linux-gnu/libcolord.so.2 (0x00007f0e14ee0000)
        ...

[Charles (clmoore3rd)]

Hi Bartosz,

Thanks for the feedback. I had tried to uninstall Simple-Scan via Ubuntu Software Center and then re-install. Since that didn't work, I followed the directions to try and build it from source
https://gitlab.gnome.org/GNOME/simple-scan
but that build attempt kind of failed at the end. Simple-Scan opened at the end of the build, but then it froze up looking for the connected scanner.

I just used sudo apt-get remove simple-scan from the terminal window, wondering if that works different than uninstall from the Software Center. Interestingly enough, it said it was removing 3.28.0-0ubuntu1

I ran which simple-scan after a restart, and was surprised to see /usr/local/bin/simple-scan
So then I tried to run simple-scan from the terminal and got the same error:
"simple-scan: error while loading shared libraries: libcolord.so.1: cannot open shared object file: No such file or directory"

When I browsed to that folder there was indeed a simple-scan executable from 2015 in that folder.
I deleted the executable, re-ran which simple-scan to confirm no entry, and then reinstalled with sudo apt-get install simple-scan
It appears to have installed 3.28.0-0ubuntu1 from package simple-scan_3.28.0-0ubuntu1_amd64.deb
but same thing when I opened simple-scan. Nothing happened.

So I ran simple-scan --debug and got this error:

"[+0.00s] DEBUG: simple-scan.vala:637: Starting Simple Scan 3.28.0, PID=4623

(simple-scan:4623): Gtk-WARNING **: 08:25:59.698: Failed to register client: GDBus.Error:org.gnome.SessionManager.AlreadyRegistered: Unable to register client
[+0.01s] ERROR: Settings schema 'org.gnome.SimpleScan' does not contain a key named 'page-delay'
Trace/breakpoint trap (core dumped)"

I don't remember installing a custom version of simple-scan.... Maybe I did. What I can say is I was running 14.04 LTS up until last year, only reason I upgraded to 18.04 LTS because I started having problems with the display driver. I upgraded straight from 14.04 LTS to 18.04 LTS via 16.04 LTS. Maybe something got lost/misconfigured in the move?

[Bartosz Kosiorek (gang65)]

Hi Charles.
I suspect that you have old schema in directory:
/usr/local/share

Please try to rename `/usr/local/share` directory to `/usr/local/share-back` and check if it helps

[Charles (clmoore3rd)]

That did it! "Bug" fixed. :) Thanks Bartosz!