I have an old computer with Ubuntu 18.04 LTS where simple scan works fine with an HP Envy printer/scanner. Now I got a new computer and installed 20.04 LTS where the simple scan shows this issue with the same scanner.
The downgrade of libsane-genesys.so from 1.0.29 to 1.0.27 (I took it from the old computer) does not help on 20.04. Maybe there are some more bugs in libsane that are already fixed in Ubuntu 21.04? So I copied the complete /usr/lib/x86_64-linux-gnu/sane/ directory from 18.04. to the 20.04 installation as "sane-old", including the libsane.so.1.0.27 from the directory level above. I created a shell script that starts simple-scan with LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/sane-old. But it did not work. I checked the process which libs are loaded (using sudo pldd <pid>). It loaded mostly the libs from sane-old, but there were still two of the original libs: .../sane/libsane-ricoh2.so.1 .../sane/libsane-escl.so.1 Then (in /usr/lib/x86_64-linux-gnu) I renamed the "sane" directory to "sane-hidden". Now (without LD_LIBRARY_PATH) no more original lib from the original subdirectory is used any more (except the top level libsane.so.1 from 1.0.29). => Now brightness and contrast can be applied as expected! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to simple-scan in Ubuntu. https://bugs.launchpad.net/bugs/1888238 Title: Ubuntu 20.04 simple-scan brightness and contrast controls have no effect Status in Simple Scan: Unknown Status in simple-scan package in Ubuntu: Incomplete Bug description: Ubuntu 20.04 simple-scan. The Brightness and Contrast controls have no effect. No matter how I position the sliders the scan image remains the same, ie, a dark background. It is as if the controls are not 'connected'. Ubuntu 20.04 is up to date. The scanner is a Cannon LiDE60. I have 19.10 in another partition. Simple-scan works as expected. Ditto for 18.04. Regards. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: simple-scan 3.36.0-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Mon Jul 20 09:47:52 2020 InstallationDate: Installed on 2020-05-12 (68 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: Hewlett-Packard HP EliteBook 8570p ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic root=UUID=dc547d11-1deb-404b-988a-a88d4772e66d ro quiet splash vt.handoff=7 SimpleScanLog: SourcePackage: simple-scan UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/05/2012 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68ICF Ver. F.32 dmi.board.name: 17A7 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 42.32 dmi.chassis.asset.tag: 8022456 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68ICFVer.F.32:bd12/05/2012:svnHewlett-Packard:pnHPEliteBook8570p:pvrA1029D1102:rvnHewlett-Packard:rn17A7:rvrKBCVersion42.32:cvnHewlett-Packard:ct10:cvr: dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=ELI dmi.product.name: HP EliteBook 8570p dmi.product.sku: D2C13UP#ABA dmi.product.version: A1029D1102 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/simple-scan/+bug/1888238/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
