Note: Verbosity is "info"

If the components of the CAPS universe are already present at your host, but no matching printer driver yet, you will get the following systemd journal entry:

CAPS kernel: usb 1-1: new full-speed USB device number 2 using musb-hdrc
CAPS kernel: usblp 1-1:1.0: usblp0: USB Bidirectional printer dev 2 if 0 alt 0 proto 2 vid 0x04F9 pid 0x0027
CAPS systemd[1]: Created slice system-caps\x2dprinter.slice.
CAPS systemd[1]: Starting Printing Driver at /dev/usb/lp0...
CAPS caps-printer-prep[150]: Reading config settings from INI file '/etc/caps/caps.ini'
CAPS caps-printer-prep[150]: Merging more config settings from INI file '/etc/caps/capsmanagement.ini'
CAPS caps-printer-prep[150]: Starting printer discovering process for device node '/dev/usb/lp0'...
CAPS caps-printer-prep[150]: Error: no printer driver available for the discovered 'HL-2030 series' printer made by 'Brother'
CAPS caps-printer-prep[150]: Info: printer's USB vendor ID is 04f9, its USB product ID is 0027
CAPS caps-printer-prep[150]: Info: printer's serial number (less important) is: XXXXXXXX
CAPS caps-printer-prep[150]: Info: printer's IEEE ID is: MFG:Brother;CMD:PJL,HBP;MDL:HL-2030 series;CLS:PRINTER;
CAPS caps-printer-prep[150]: Solution: install a printer driver for this printer device first
CAPS systemd[1]: caps-printer@-dev-usb-lp0.service: Control process exited, code=exited status=22
CAPS systemd[1]: caps-printer@-dev-usb-lp0.service: Failed with result 'exit-code'.
CAPS systemd[1]: Failed to start Printing Driver at /dev/usb/lp0.

If the matching printer driver is already installed, the journal entry differs:

CAPS kernel: usb 1-1: new full-speed USB device number 3 using musb-hdrc
CAPS kernel: usblp 1-1:1.0: usblp0: USB Bidirectional printer dev 3 if 0 alt 0 proto 2 vid 0x04F9 pid 0x0027
CAPS systemd[1]: Starting Printing Driver at /dev/usb/lp0...
CAPS caps-printer-prep[167]: Reading config settings from INI file '/etc/caps/caps.ini' <---- LOUD
CAPS caps-printer-prep[167]: Merging more config settings from INI file '/etc/caps/capsmanagement.ini' <--- LOUD
CAPS caps-printer-prep[167]: Starting printer discovering process for device node '/dev/usb/lp0'...
CAPS caps-printer-prep[167]: Printer device at '/dev/usb/lp0' is already known. Preparation skipped.
CAPS systemd[1]: Started Printing Driver at /dev/usb/lp0.
CAPS caps-printer[169]: Reading config settings from INI file '/etc/caps/caps.ini' <--- LOUD
CAPS caps-printer[169]: Merging more config settings from INI file '/etc/caps/capsmanagement.ini' <--- LOUD
CAPS caps-printer[169]: Going to launch printer driver for device node '/dev/usb/lp0'...
CAPS caps-printer[169]: Info: driver configuration file: 'caps-brother-HL2030-driver.ini' <--- LOUD
CAPS caps-printer[169]: Info: device specific parameter directory: 'printer_6PqHu2' <--- LOUD
CAPS caps-printer[169]: - Brief description: 'Brother, HL-20 monochrome laser printer' <--- LOUD
CAPS caps-printer[169]: - Vendor: 'Brother' <--- LOUD
CAPS caps-printer[169]: - Device: 'HL-2030' <--- LOUD
CAPS caps-printer[169]: HL series driver is starting
CAPS caps-printer[169]: Reading the base settings from INI file '/etc/caps/drivers/capsdriver.ini' <--- LOUD
CAPS caps-printer[169]: Reading the default settings from INI file '/usr/share/caps/drivers/caps-brother-HL2030-driver.ini' <--- LOUD
CAPS caps-printer[169]: Merging more default features from INI file '/etc/caps/drivers/hl20-driver.ini' <--- LOUD
CAPS caps-printer[169]: Reading device specific INI files from parameter directory '/var/lib/caps/printer_6PqHu2' <--- LOUD
CAPS caps-printer[169]: HL series driver is up and running

Die Angaben über INI-Dateien könnte auch einfach "LOUD" und nicht INFO sein:

CAPS kernel: usb 1-1: new full-speed USB device number 3 using musb-hdrc
CAPS kernel: usblp 1-1:1.0: usblp0: USB Bidirectional printer dev 3 if 0 alt 0 proto 2 vid 0x04F9 pid 0x0027
CAPS systemd[1]: Starting Printing Driver at /dev/usb/lp0...
CAPS caps-printer-prep[167]: Starting printer discovering process for device node '/dev/usb/lp0'...
CAPS caps-printer-prep[167]: Printer device at '/dev/usb/lp0' is already known. Preparation skipped. <--- hier die Infos des Benutzers ausgeben? Also die Gerätespezifischen INI-Sachen eher "Preparation skipped eher" weglassen. Es fügt keine wirkliche Info hinzu.
CAPS systemd[1]: Started Printing Driver at /dev/usb/lp0.
CAPS caps-printer[169]: Info: description: 'Brother, HL-20 monochrome laser printer'
CAPS caps-printer[169]: Info: connected to: '/dev/usb/lp0'
CAPS caps-printer[169]: Info: vendor: 'Brother'
CAPS caps-printer[169]: Info: device: 'HL-2030'
CAPS caps-printer[169]: Going to launch printer driver for 'Brother, HL-20 monochrome laser printer'

Then the driver itself is launching:

CAPS caps-printer[169]: HL series driver is starting
CAPS caps-printer[169]: HL series driver is up and running