Bugzilla Bug 156327

I have an HP laserjet 1320 laser printer.

I found that, after install hplip-1.6.10, my Agfa scanner stop working.

After investigate this issue, i found the problem: hplip installation deletes
the previous contents of /etc/sane.d/, and then xsane is only capable of work
with hp scanners. May be a good idea is hplip installation don't deletes
previous content of this file, and only add the hpaio line is is not yet
present in the file.

The /etc/sane.d/dll.conf contents after hplip install was:

# cat dll.conf
hpaio

when the original file content is:

# enable the next line if you want to allow access through the network:
net
abaton
agfafocus
apple
avision
artec
artec_eplus48u
as6e
bh
canon
canon630u
#canon_pp
coolscan
coolscan2
#dc25
#dc210
#dc240
dell1600n_net
dmc
epson
fujitsu
#gphoto2
genesys
gt68xx
hp
hpsj5s
hp3500
hp4200
hp5400
ibm
leo
lexmark
ma1509
matsushita
microtek
microtek2
mustek
#mustek_pp
mustek_usb
mustek_usb2
nec
niash
pie
pint
pixma
plustek
#plustek_pp
#pnm
qcam
ricoh
s9036
sceptre
sharp
sm3600
sm3840
snapscan
sp15c
#st400
#stv680
tamarack
teco1
teco2
teco3
#test
u12
umax
#umax_pp
umax1220u
v4l
#
# The following backends are not included in the sane-backends distribution
# If you want to use them, download them from their webpages and read their
# documentation 
#
# HP OfficeJet backend homepage: http://hpoj.sf.net/
# Uncomment the following line if hpoj is installed:
#hpoj

*** This bug has been marked as a duplicate of 150801 ***