Update, I found that CUPS was failing to be modified by the gnome(?)
user interface component.
apparmor is getting in the way, "protecting" cupsd.
To fix this, install the apparmor utilities:
sudo apt-get install apparmor-utils
Then set apparmor to complain about cupsd, instead of blocking access:
sudo aa-complain cupsd
You can now print. I hope this helps someone else too. This was quite
difficult to troubleshoot.
ar 24 16:10:45 semiauto google-chrome.desktop[216920]:
[216913:216943:0324/161045.967690:ERROR:connection_factory_impl.cc(428)] Failed
to connect to MCS endpoint with error -105
Mar 24 16:10:46 semiauto google-chrome.desktop[216920]:
[216913:216913:0324/161046.442656:ERROR:device_event_log_impl.cc(222)]
[16:10:46.442] Printer: local_printer_handler_default.cc:167 Failure
enumerating local printers, result: kFailed
Mar 24 16:10:46 semiauto google-chrome.desktop[216920]: Warning: disabling flag
--expose_wasm due to conflicting flags
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:325:
DeprecationWarning: Gtk.ActionGroup.list_actions is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: for action in
printer_manager_action_group.list_actions ():
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:326:
DeprecationWarning: Gtk.Action.set_sensitive is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: action.set_sensitive
(False)
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:334:
DeprecationWarning: Gtk.ActionGroup.get_action is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: act =
printer_manager_action_group.get_action (action)
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:364:
DeprecationWarning: Gtk.UIManager.ensure_update is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
self.ui_manager.ensure_update ()
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:365:
DeprecationWarning: Gtk.UIManager.get_accel_group is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
self.PrintersWindow.add_accel_group (self.ui_manager.get_accel_group ())
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:374:
DeprecationWarning: Gtk.UIManager.get_action is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: action =
self.ui_manager.get_action ("/new-printer")
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:375:
DeprecationWarning: Gtk.Action.create_menu_item is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: newprinteritem =
action.create_menu_item ()
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:673:
DeprecationWarning: Gtk.Action.get_proxies is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: for widget in
action.get_proxies ():
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]:
/usr/share/system-config-printer/system-config-printer.py:2253:
DeprecationWarning: Gdk.threads_enter is deprecated
Mar 24 16:10:51 semiauto google-chrome.desktop[216920]: Gdk.threads_enter ()
Mar 24 16:10:51 semiauto dbus-daemon[764]: [system] Activating via systemd:
service name='org.freedesktop.hostname1'
unit='dbus-org.freedesktop.hostname1.service' requested by ':1.1686' (uid=1000
pid=395280 comm="/usr/bin/python3 /usr/share/system-config-printer/"
label="unconfined")
Mar 24 16:10:51 semiauto systemd[1]: Starting Hostname Service...
Mar 24 16:10:51 semiauto dbus-daemon[764]: [system] Successfully activated
service 'org.freedesktop.hostname1'
Mar 24 16:10:51 semiauto systemd[1]: Started Hostname Service.
Mar 24 16:10:53 semiauto kernel: [663246.142511] serial 0000:00:16.3: LSR
safety check engaged!
Mar 24 16:10:53 semiauto kernel: [663246.142539] audit: type=1400
audit(1679688653.733:100): apparmor="DENIED" operation="capable" class="cap"
profile="/usr/sbin/cupsd" pid=395323 comm="serial" capability=21
capname="sys_admin"
Here were a few other telling messages:
Mar 24 16:13:14 semiauto kernel: [663387.182005] audit: type=1400
audit(1679688794.769:101): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:17 semiauto kernel: [663389.718118] audit: type=1400
audit(1679688797.305:102): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:24 semiauto kernel: [663397.180664] audit: type=1400
audit(1679688804.769:103): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:24 semiauto kernel: [663397.180678] audit: type=1400
audit(1679688804.769:104): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:26 semiauto kernel: [663399.385467] audit: type=1400
audit(1679688806.973:105): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:26 semiauto kernel: [663399.385511] audit: type=1400
audit(1679688806.973:106): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:29 semiauto kernel: [663401.903042] audit: type=1400
audit(1679688809.489:107): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:13:31 semiauto kernel: [663403.494875] audit: type=1400
audit(1679688811.081:108): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:14:50 semiauto kernel: [663483.050466] audit: type=1400
audit(1679688890.638:111): apparmor="DENIED" operation="file_lock"
class="file" profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961
comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0
Mar 24 16:14:52 semiauto kernel: [663485.093715] audit: type=1400
audit(1679688892.682:112): apparmor="DENIED" operation="file_lock" class="file"
profile="/usr/sbin/cupsd" name="/run/utmp" pid=287961 comm="cupsd"
requested_mask="k" denied_mask="k" fsuid=0 ouid=0
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to cups in Ubuntu.
https://bugs.launchpad.net/bugs/2012288
Title:
Ubuntu Gnome Settings / Chrome / CUPS (printing) communications
Status in cups package in Ubuntu:
New
Bug description:
I am trying to print.
Context ::
printer -
The network printer I have "HP LaserJet Professional M1217nfw MFP" announces
itself via Bonjour, supports SLP Config, LPD Printing and WS-Discovery.
The printer is wired to ethernet, and receives it's IP address in IPV4
and IPV6 from the router, set statically at the router.
Client -
The client machine, Ubuntu 22.10 , is either on wireless (192.168.2.X - DHCP
assigned randomly) or wired ethernet (192.168.2.Y - DHCP assigned
statically). Sometimes the machine has both interfaces as well as receiving
IPV6 addresses for both of these interfaces.
It's unclear how printing occurs for discovery, but for comparison -
Android "just works", iPhone "just works" , and Windows 10 "just
works". Only Ubuntu is the outlier here.
When printing a PDF from Chrome, I see there is a mismatch between the
printers that Chrome sees, and the printers that are registered with the
gnome(?) printers configuration settings. This leads me to believe that these
2 parts of printing are not in sync with one another(!!).
Additional, possibly related behavior:
When I remove all printers listed. And simply watch the Gnome(?) Printers
settings section then a new printer is added automatically exactly this text,
yes the duplicate 'HP': "HP HP Laserjet
Professional M1217nfw MFP, driverless".
This may be a cause of issues since I have not configured an
additional printer, yet it appears.
When I DO attempt to print to this auto-added printer I receive a
vague error after some kind of timeout "Stopped Please restart when
the problem is resolved" --- what problem ? What is causing the
issue ? This error does not help identify the issue.
Can you help me understand what is happening here and how this can be
resolved ? If auto-adding a printer is going to magically work , then please
include detailed, actionable error messages.
Attached -- screenshot of printer subsystems mismatch.
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.19.0-35.36-generic 5.19.17
Uname: Linux 5.19.0-35-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 525.85.05 Sat Jan 14
00:49:50 UTC 2023
GCC version: gcc version 12.2.0 (Ubuntu 12.2.0-3ubuntu1)
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 20 11:54:41 2023
DistUpgraded: 2023-01-14 21:42:30,924 DEBUG Running PostInstallScript:
'/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
DistroCodename: kinetic
DistroVariant: ubuntu
DkmsStatus:
8812au/5.6.4.2_35491.20191025, 5.19.0-31-generic, x86_64: installed
8812au/5.6.4.2_35491.20191025, 5.19.0-35-generic, x86_64: installed
nvidia/525.85.05, 5.19.0-35-generic, x86_64: installed
virtualbox/6.1.38, 5.19.0-31-generic, x86_64: installed
virtualbox/6.1.38, 5.19.0-35-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] [8086:9a49] (rev 01)
(prog-if 00 [VGA controller])
Subsystem: Lenovo TigerLake-LP GT2 [Iris Xe Graphics] [17aa:22d4]
InstallationDate: Installed on 2023-01-09 (70 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64
(20220809.1)
MachineType: LENOVO 20XY0027US
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-35-generic
root=UUID=1cae8af8-977f-4853-9106-9169f34c4bc2 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to kinetic on 2023-01-15 (64 days ago)
dmi.bios.date: 02/09/2023
dmi.bios.release: 1.59
dmi.bios.vendor: LENOVO
dmi.bios.version: N32ET83W (1.59 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20XY0027US
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.33
dmi.modalias:
dmi:bvnLENOVO:bvrN32ET83W(1.59):bd02/09/2023:br1.59:efr1.33:svnLENOVO:pn20XY0027US:pvrThinkPadX1YogaGen6:rvnLENOVO:rn20XY0027US:rvrSDK0J40697WIN:cvnLENOVO:ct31:cvrNone:skuLENOVO_MT_20XY_BU_Think_FM_ThinkPadX1YogaGen6:
dmi.product.family: ThinkPad X1 Yoga Gen 6
dmi.product.name: 20XY0027US
dmi.product.sku: LENOVO_MT_20XY_BU_Think_FM_ThinkPad X1 Yoga Gen 6
dmi.product.version: ThinkPad X1 Yoga Gen 6
dmi.sys.vendor: LENOVO
nvidia-settings: ERROR: An internal driver error occurred
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.113-2
version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.5-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx 22.2.5-0ubuntu0.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2build1
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