@deano_ferrari THANKS INDEED!
Getting the libsane-hpgt2500 libraries out of the way fixes the issue for me …
~> scanimage -L
device `hpaio:/usb/HP_ScanJet_Pro_2600_f1?serial=CN26HAP202' is a Hewlett-Packard HP_ScanJet_Pro_2600_f1 all-in-one
~> simple-scan
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:981: FINISHME: support more multi-planar formats with DRM modifiers
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:949: FINISHME: support YUV colorspace with DRM format modifiers
…opens the GUI and scanning works as it did before.
Hm, talking about libraries: I thought my ones are up to date, but I do not have
/usr/lib64/sane/libsane-hpgt2500.so.1.2.1
Instead the .so.1 links to .so.1.0.27 :
lrwxrwxrwx 1 root root 49 Sep 16 08:41 /usr/lib64/sane/libsane-hpgt2500.so.1 -> /usr/lib64/sane/libsane-hpgt2500-x86_64.so.1.0.27
So I removed the sane infrastructure:
zypper remove hplip-sane libsane1 sane-backends sane-backends-autoconfig
Did a reboot, and then installed the packages again adding hplip as suggested by zypper:
zypper install hplip hplip-sane libsane1 sane-backends sane-backends-autoconfig
(Probably some redundancy in both calls, I just explicitly removed installed packages naming sane and the installed them again.)
and I do have the same /usr/lib64/sane/libsane-hpgt2500-x86_64.so.1.0.27 .
… sigh… , and now everything runs fine and smooth with the libraries that have been there before and I do not see what was screwed.
Thanks to everyone helping!
This can probably be closed.