CUPS Unauthorized when using Chrome browser in Ubuntu 18.04

[Terrance]

Using Chrome Version 66.0.3359.139 (Official Build) (64-bit)

I am able to access and add a printer through Chrome by going to the page http://localhost:631/admin/login and I can add a printer fine. But I cannot add the printer if I go directly to http://localhost:631/admin and bypass the login. If I need to change any defaults of the printer through the same pages it gives me the "Unauthorized" and will not change anything. I can change it in Firefox and the printers control panel.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: cups 2.2.7-1ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CupsErrorLog:
 E [08/May/2018:00:07:44 -0600] Filter \"pstops\" not found.
 E [08/May/2018:00:07:44 -0600] Filter \"pstops\" not found.
 E [08/May/2018:07:01:45 -0600] [Client 20] pam_authenticate() returned 7 (Authentication failure)
 E [08/May/2018:07:02:01 -0600] [cups-deviced] PID 15052 (gutenprint52+usb) stopped with status 1!
CurrentDesktop: XFCE
Date: Tue May 8 07:18:47 2018
InstallationDate: Installed on 2018-05-05 (2 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Lpstat:
 device for Deskjet_3520_series_75C0A7_: ipp://HP6C3BE575C0A7.local:631/ipp/print
 device for HP_Color_LaserJet_CP1518ni: socket://10.0.0.253
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7508
Papersize: letter
PpdFiles:
 Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Deskjet_3520_series_75C0A7_.ppd', '/etc/cups/ppd/HP_Color_LaserJet_CP1518ni.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Deskjet_3520_series_75C0A7_.ppd: Permission denied
 grep: /etc/cups/ppd/HP_Color_LaserJet_CP1518ni.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=5dae0d38-9bbe-48de-b110-62763c862892 ro nosplash net.ifnames=0 biosdevname=0
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/30/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V3.8
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: K9N2GM-FIH(MS-7508)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV3.8:bd09/30/2010:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7508:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnK9N2GM-FIH(MS-7508):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: MS-7508
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Marcos Teixeira (marcos-teixeira)]

I solved using this command

# usermod -aG lpadmin YourUserName

[Terrance (kato223)]

@Marcos Teixeira Unfortunately, I was already part of the lpadmin group before all this started. So that doesn't work.

[guy eastwood (j-ub6ntu-u)]

This allowed me to add a Canon IP7200 via the local CUPS httpd:

https://forum.manjaro.org/t/latest-chrome-unauthorized-to-alter-cups/45286

I could print a test page from CUPS via the webpage.

Unfortunately still not able to add via the system device dialogs - CUPS internal server error

[Adom (adomj)]

I feel that is a bug between the two. I can't do the organization itself of the printer either. In any case, I have discovered that when I include the printer through CUPS along these lines paying little respect to the program, applications in Wine will really observe and utilize the printer. You can visit https://www.browsertechnicalsupportnumbers.com/blog/fix-chrome-err-spdy-protocol-error/ and follow the step to fix the bug issue.

[Terrance (kato223)]

I have found that version 2.2.8 that comes with Ubuntu 18.10 works fine. I downloaded and installed it into Ubuntu 18.04 from https://launchpad.net/ubuntu/+source/cups/2.2.8-5ubuntu1.2 and it asked for login and all admin functions were working as expected.