03f0:4f11 scanimage: open of device net:localhost failed: Error during device I/O

[penalvch]

scanimage --device net:localhost -vv
scanimage: open of device net:localhost failed: Error during device I/O
Calling sane_exit
scanimage: finished

This is related to https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1442956 .

Tried hplip 3.15.4 same thing.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: hplip 3.15.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CupsErrorLog: E [25/Apr/2015:07:50:24 -0500] Unable to open listen socket for address [v1.::1]:631 - Cannot assign requested address.
CurrentDesktop: GNOME-Flashback:Unity
Date: Sat Apr 25 08:18:12 2015
InstallationDate: Installed on 2015-04-09 (16 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
Lpstat: device for hpwifiprinter: usb://HP/Officejet%205600%20series?serial=CN6ABD531H04B2&interface=1
MachineType: Hewlett-Packard HP ProDesk 400 G1 MT
Papersize: letter
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/hpwifiprinter.ppd'] failed with exit code 2: grep: /etc/cups/ppd/hpwifiprinter.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic root=UUID=e650b88a-c6af-4c6a-998a-58f6b206b264 ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7
SourcePackage: hplip
UpgradeStatus: Upgraded to vivid on 2015-04-21 (4 days ago)
dmi.bios.date: 12/11/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L02 v02.39
dmi.board.asset.tag: MXL4090N3K
dmi.board.name: 198E
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: MXL4090N3K
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL02v02.39:bd12/11/2014:svnHewlett-Packard:pnHPProDesk400G1MT:pvr:rvnHewlett-Packard:rn198E:rvr:cvnHewlett-Packard:ct6:cvr:
dmi.product.name: HP ProDesk 400 G1 MT
dmi.sys.vendor: Hewlett-Packard