Really amazed at your perseverance I must say that I am learning a lot from you. I did not want to bother you any more so I did not inform you that yesterday I already got rid of dbus following your instructions plus went over to the Handbook again and understood this time 4.6 Post-Installation Activities, found the place of xsane docs and applied some of the suggestions i.e. I uncommented, (that is put a # in front of), all back ends except genesys.
That rendered xsane extremely fast showing up as root and same in telling me: cannot open..... etc, I/O error..., as jv
Unfortunately I was unable to discover the file of syslog.conf much as I tried. So was unable to try and create /var/log/all.log
Now there are no endless dbus errors but I have endless "failed to initialize a HAL context: (null)"
I will let you know as soon as I 'digest' your newer instructions!