Hi Ariel, thank you so much for your effort.
I implemented the patch, under Gentoo and got this error: # emerge sane-backends Calculating dependencies ...done! >>> emerge (1 of 1) media-gfx/sane-backends-1.0.15 to / >>> md5 files ;-) sane-backends-1.0.15.ebuild >>> md5 files ;-) sane-backends-1.0.13-r3.ebuild >>> md5 files ;-) sane-backends-1.0.15-r1.ebuild >>> md5 files ;-) sane-backends-1.0.15-r2.ebuild >>> md5 files ;-) sane-backends-1.0.15-r3.ebuild >>> md5 files ;-) sane-backends-1.0.16-r1.ebuild >>> md5 files ;-) sane-backends-1.0.16-r2.ebuild >>> md5 files ;-) sane-backends-1.0.15.ebuild.bk >>> md5 files ;-) files/digest-sane-backends-1.0.15 >>> md5 files ;-) files/canoscan-focus.patch >>> md5 files ;-) files/cs2-ls50-full.patch >>> md5 files ;-) files/lide25.patch >>> md5 files ;-) files/digest-sane-backends-1.0.13-r3 >>> md5 files ;-) files/digest-sane-backends-1.0.15-r1 >>> md5 files ;-) files/digest-sane-backends-1.0.15-r2 >>> md5 files ;-) files/libusbscanner-device-r1.patch >>> md5 files ;-) files/libusbscanner-device.patch >>> md5 files ;-) files/linux_sg3_err.h >>> md5 files ;-) files/digest-sane-backends-1.0.15-r3 >>> md5 files ;-) files/sane-backend-1.0.15-gt68xx-update67.patch >>> md5 files ;-) files/digest-sane-backends-1.0.16-r1 >>> md5 files ;-) files/digest-sane-backends-1.0.16-r2 >>> md5 src_uri ;-) sane-backends-1.0.15.tar.gz >>> md5 src_uri ;-) sane-backends-1.0.15-brothermfc.patch.bz2 >>> Unpacking source... >>> Unpacking sane-backends-1.0.15.tar.gz to /var/tmp/portage/sane-backends-1.0.15/work >>> Unpacking sane-backends-1.0.15-brothermfc.patch.bz2 to /var/tmp/portage/sane-backends-1.0.15/work >>> Unpacking sane-backends-1.0.15-brothermfc.patch.bz2 to /var/tmp/portage/sane-backends-1.0.15/work * Applying canoscan-focus.patch ... [ ok ] * Applying cs2-ls50-full.patch ... * Failed Patch: cs2-ls50-full.patch ! * ( /usr/portage/media-gfx/sane-backends/files/cs2-ls50-full.patch ) * * Include in your bugreport the contents of: * * /var/tmp/portage/sane-backends-1.0.15/temp/cs2-ls50-full.patch-15359.out !!! ERROR: media-gfx/sane-backends-1.0.15 failed. !!! Function epatch, Line 363, Exitcode 0 !!! Failed Patch: cs2-ls50-full.patch! !!! If you need support, post the topmost build error, NOT this status message. Do you happend to know anything about this or did I do something wrong? thank you, Spiro