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uname -a
Linux oem-latitude5420rugged 6.17.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC Fri Jan  9 17:01:16 UTC 2026 x86_64 GNU/Linux

dpkg -l *cups* lpr* | grep ii
ii  bluez-cups                5.83-1~exp1ubuntu0.1   amd64        Bluetooth printer driver for CUPS
ii  cpdb-backend-cups         2.0b7-0ubuntu2         amd64        Common Print Dialog Backends - CUPS/IPP Backend
ii  cups                      2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - PPD/driver support, web interface
ii  cups-browsed              2.1.1-0ubuntu2         amd64        OpenPrinting cups-browsed
ii  cups-bsd                  2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - BSD commands
ii  cups-client               2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - client programs (SysV)
ii  cups-common               2.4.12-0ubuntu3.5      all          Common UNIX Printing System(tm) - common files
ii  cups-core-drivers         2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - driverless printing
ii  cups-daemon               2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - daemon
ii  cups-filters              2.0.1-0ubuntu3.25.10.1 amd64        OpenPrinting CUPS Filters - Main Package
ii  cups-filters-core-drivers 2.0.1-0ubuntu3.25.10.1 amd64        OpenPrinting CUPS Filters - Driverless printing
ii  cups-ipp-utils            2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - IPP developer/admin utilities
ii  cups-pk-helper            0.2.6-2.1              amd64        PolicyKit helper to configure cups with fine-grained privileges
ii  cups-ppdc                 2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - PPD manipulation utilities
ii  cups-server-common        2.4.12-0ubuntu3.5      all          Common UNIX Printing System(tm) - server common files
ii  libcups2t64:amd64         2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - Core library
ii  libcupsfilters2-common    2.1.1-0ubuntu3.1       all          OpenPrinting libcupsfilters - Auxiliary files
ii  libcupsfilters2t64:amd64  2.1.1-0ubuntu3.1       amd64        OpenPrinting libcupsfilters - Shared library
ii  libcupsimage2t64:amd64    2.4.12-0ubuntu3.5      amd64        Common UNIX Printing System(tm) - Raster image library
ii  printer-driver-hpcups     3.24.4+dfsg0-0ubuntu5  amd64        HP Linux Printing and Imaging - CUPS Raster driver (hpcups)
ii  python3-cups:amd64        2.0.4-2build2          amd64        Python3 bindings for CUPS
ii  python3-cupshelpers       1.5.18-4ubuntu1        all          Python utility modules around the CUPS printing system

dpkg -l libusb* | grep ii
ii  libusb-1.0-0:amd64     2:1.0.29-2    amd64        userspace USB programming library
ii  libusbmuxd-2.0-7:amd64 2.1.0-1build1 amd64        Client library to handle usbmux connections with iOS devices (library)

dpkg -l | egrep hp
ii  hplip                                               3.24.4+dfsg0-0ubuntu5                      amd64        HP Linux Printing and Imaging System (HPLIP)
ii  hplip-data                                          3.24.4+dfsg0-0ubuntu5                      all          HP Linux Printing and Imaging - data files
ii  libhpmud0:amd64                                     3.24.4+dfsg0-0ubuntu5                      amd64        HP Multi-Point Transport Driver (hpmud) run-time libraries
ii  libsane-hpaio:amd64                                 3.24.4+dfsg0-0ubuntu5                      amd64        HP SANE backend for multi-function peripherals
ii  printer-driver-hpcups                               3.24.4+dfsg0-0ubuntu5                      amd64        HP Linux Printing and Imaging - CUPS Raster driver (hpcups)
ii  printer-driver-postscript-hp                        3.24.4+dfsg0-0ubuntu5                      amd64        HP Printers PostScript Descriptions
ii  python3-launchpadlib                                2.1.0-1                                    all          Launchpad web services client library (Python 3)

systemctl --no-pager status cups*
● cups.service - CUPS Scheduler
     Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-03-02 09:17:08 CET; 17min ago
 Invocation: 3ff24ea1911742f4995da2af1f4479f8
TriggeredBy: ● cups.socket
             ● cups.path
       Docs: man:cupsd(8)
   Main PID: 1464 (cupsd)
     Status: "Scheduler is running..."
      Tasks: 2 (limit: 18926)
     Memory: 6.7M (peak: 7.2M)
        CPU: 47ms
     CGroup: /system.slice/system-cups.slice/cups.service
             ├─1464 /usr/sbin/cupsd -l
             └─1490 /usr/lib/cups/notifier/dbus dbus://

Mär 02 09:17:08 oem-latitude5420rugged systemd[1]: Starting cups.s…..
Mär 02 09:17:08 oem-latitude5420rugged systemd[1]: Started cups.se…r.
Warning: The unit file, source configuration file or drop-ins of cups.service changed on disk. Run 'systemctl daemon-reload' to reload units.                                                                     

● cups-browsed.service - Make remote CUPS printers available locally
     Loaded: loaded (/usr/lib/systemd/system/cups-browsed.service; enabled; preset: enabled)                                                
     Active: active (running) since Mon 2026-03-02 09:17:14 CET; 17min ago
 Invocation: 0fd7a75314384cff9cd4bc67fc391ac5
   Main PID: 1971 (cups-browsed)
      Tasks: 4 (limit: 18926)
     Memory: 9.3M (peak: 12.9M)
        CPU: 115ms
     CGroup: /system.slice/system-cups.slice/cups-browsed.service
             └─1971 /usr/sbin/cups-browsed

Mär 02 09:17:14 oem-latitude5420rugged systemd[1]: Started cups-br…y.
Warning: The unit file, source configuration file or drop-ins of cups-browsed.service changed on disk. Run 'systemctl daemon-reload' to reload units.                                                             

● cups.socket - CUPS Scheduler
     Loaded: loaded (/usr/lib/systemd/system/cups.socket; enabled; preset: enabled)
     Active: active (running) since Mon 2026-03-02 09:17:06 CET; 18min ago
 Invocation: 58d57d2ae0f74a1e83d68345d1dcd8ea
   Triggers: ● cups.service
     Listen: /run/cups/cups.sock (Stream)
     CGroup: /system.slice/cups.socket

Mär 02 09:17:06 oem-latitude5420rugged systemd[1]: Listening on cu…r.
Warning: The unit file, source configuration file or drop-ins of cups.socket changed on disk. Run 'systemctl daemon-reload' to reload units.

● cups.path - CUPS Scheduler
     Loaded: loaded (/usr/lib/systemd/system/cups.path; enabled; preset: enabled)
     Active: active (running) since Mon 2026-03-02 09:17:06 CET; 18min ago
 Invocation: 707096803b8847a3b0a5b57bf5aac081
   Triggers: ● cups.service

Mär 02 09:17:06 oem-latitude5420rugged systemd[1]: Started cups.pa…r.
Warning: The unit file, source configuration file or drop-ins of cups.path changed on disk. Run 'systemctl daemon-reload' to reload units.  
Hint: Some lines were ellipsized, use -l to show in full.

lpstat -t
Zeitplandienst läuft
keine systemvoreingestellten Ziele
lpstat: Keine Druckziele hinzugefügt.
lpstat: Keine Druckziele hinzugefügt.
lpstat: Keine Druckziele hinzugefügt.
lpstat: Keine Druckziele hinzugefügt.

lpinfo -v
network ipp
network lpd
network http
network beh
network https
serial serial:/dev/ttyS0?baud=115200
serial serial:/dev/ttyUSB0?baud=230400
serial serial:/dev/ttyUSB1?baud=230400
serial serial:/dev/ttyUSB2?baud=230400
serial serial:/dev/ttyUSB3?baud=230400
network socket
network ipps
direct hp
direct hpfax
network dnssd://HP%20Color%20LaserJet%20Flow%20MFP%20E778%20%5BDD776C%5D._ipps._tcp.local/?uuid=96588a8e-81c4-4de8-aa4f-0a61ce819298
network socket://192.168.132.130:9100
network dnssd://HP%20Color%20LaserJet%20Flow%20MFP%20E778%20%5BDD776C%5D._printer._tcp.local/?uuid=96588a8e-81c4-4de8-aa4f-0a61ce819298
network ipps://HP%20Color%20LaserJet%20Flow%20MFP%20E778%20%5BDD776C%5D._ipps._tcp.local/

hp-info -i

HP Linux Imaging and Printing System (ver. 3.24.4)
Device Information Utility ver. 5.2

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

error: No device found that support this feature.

uname -rm
6.17.0-14-generic x86_64

lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0eef:c0d1 D-WAV Scientific Co., Ltd eGalaxTouch EXC3188-5001-09.00.00.00
Bus 001 Device 004: ID 1bcf:28bc Sunplus Innovation Technology Inc. Integrated_Webcam_HD
Bus 001 Device 005: ID 0424:2807 Microchip Technology, Inc. (formerly SMSC) Hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 0424:5807 Microchip Technology, Inc. (formerly SMSC) Hub
Bus 002 Device 003: ID 413c:81d7 Dell Computer Corp. DW5821e Snapdragon X20 LTE
Bus 002 Device 004: ID 0bda:0328 Realtek Semiconductor Corp. USB3.0-CRW

id
uid=60999(oem) gid=60999(oem) groups=60999(oem),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),115(lpadmin),986(sambashare)

ls -l /etc/cups/ppd/* 
ls: cannot access '/etc/cups/ppd/*': No such file or directory