I have Riello UPS SEP 2200 ER NP model, connected via USB cable. nut-scanner find it and generates (IMO reasonable) description for /etc/ups/ups.conf : # nut-scanner -U Scanning USB bus. [nutdev1] driver = "riello_usb" port = "auto" vendorid = "04B4" productid = "5500" product = "USB to Serial" vendor = "Cypress Semiconductor" bus = "001" but then driver start fails with syslog messages 'Fatal error: 'vendorid' is not a valid variable name for this driver': Jul 23 20:33:47 nosec systemd[1]: Starting nut-driver - Network UPS Tools - device driver for nutdev1... Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: Network UPS Tools - Riello USB driver 0.07 (2.8.0) Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: Warning: This is an experimental driver. Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: Some features may not function correctly. Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: Fatal error: 'vendorid' is not a valid variable name for this driver. Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: Look in the man page or call this driver with -h for a list of Jul 23 20:33:47 nosec nut-driver@nutdev1[453060]: valid variable names and flags. Jul 23 20:33:47 nosec nut-driver@nutdev1[453032]: Network UPS Tools - UPS driver controller 2.8.0 Jul 23 20:33:47 nosec nut-driver@nutdev1[453061]: Can't open /run/nut/riello_usb-nutdev1.pid: No such file or directory Jul 23 20:33:47 nosec nut-driver@nutdev1[453061]: Can't open /run/nut/riello_usb-auto.pid either: No such file or directory Jul 23 20:33:47 nosec nut-driver@nutdev1[453061]: Network UPS Tools - UPS driver controller 2.8.0 Jul 23 20:33:47 nosec systemd[1]: nut-driver: Control process exited, code=exited, status=1/FAILURE Jul 23 20:33:47 nosec systemd[1]: nut-driver: Failed with result 'exit-code'. Jul 23 20:33:47 nosec systemd[1]: Failed to start nut-driver - Network UPS Tools - device driver for nutdev1. If I comment vendorid= line in ups.conf, then driver start fails on productid keyword: Jul 23 20:38:54 nosec systemd[1]: Starting nut-driver - Network UPS Tools - device driver for nutdev1... Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: Network UPS Tools - Riello USB driver 0.07 (2.8.0) Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: Warning: This is an experimental driver. Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: Some features may not function correctly. Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: Fatal error: 'productid' is not a valid variable name for this driver. Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: Look in the man page or call this driver with -h for a list of Jul 23 20:38:54 nosec nut-driver@nutdev1[455385]: valid variable names and flags. Jul 23 20:38:54 nosec nut-driver@nutdev1[455357]: Network UPS Tools - UPS driver controller 2.8.0 Jul 23 20:38:54 nosec nut-driver@nutdev1[455386]: Can't open /run/nut/riello_usb-nutdev1.pid: No such file or directory Jul 23 20:38:54 nosec nut-driver@nutdev1[455386]: Can't open /run/nut/riello_usb-auto.pid either: No such file or directory Jul 23 20:38:54 nosec nut-driver@nutdev1[455386]: Network UPS Tools - UPS driver controller 2.8.0 Jul 23 20:38:54 nosec systemd[1]: nut-driver: Control process exited, code=exited, status=1/FAILURE Jul 23 20:38:54 nosec systemd[1]: nut-driver: Failed with result 'exit-code'. Jul 23 20:38:54 nosec systemd[1]: Failed to start nut-driver - Network UPS Tools - device driver for nutdev1. It is same with other keywords product, vendor and bus. When UPS description has only driver and port, then driver fails with: Jul 23 20:48:58 nosec systemd[1]: Starting nut-driver - Network UPS Tools - device driver for nutdev1... Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: Network UPS Tools - Riello USB driver 0.07 (2.8.0) Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: Warning: This is an experimental driver. Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: Some features may not function correctly. Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: libusb1: Could not open any HID devices: insufficient permissions on everything Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: No supported devices found. Please check your device availability with 'lsusb' Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: and make sure you have an up-to-date version of NUT. If this does not help, Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: try running the driver with at least 'subdriver', 'vendorid' and 'productid' Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: options specified. Please refer to the man page for details about these options Jul 23 20:48:58 nosec nut-driver@nutdev1[459348]: (man 8 riello_usb). Jul 23 20:48:58 nosec nut-driver@nutdev1[459320]: Driver failed to start (exit status=1) Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: Network UPS Tools - Riello USB driver 0.07 (2.8.0) Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: Warning: This is an experimental driver. Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: Some features may not function correctly. Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: libusb1: Could not open any HID devices: insufficient permissions on everything Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: No supported devices found. Please check your device availability with 'lsusb' Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: and make sure you have an up-to-date version of NUT. If this does not help, Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: try running the driver with at least 'subdriver', 'vendorid' and 'productid' Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: options specified. Please refer to the man page for details about these options Jul 23 20:49:03 nosec nut-driver@nutdev1[459376]: (man 8 riello_usb). Jul 23 20:49:03 nosec nut-driver@nutdev1[459320]: Driver failed to start (exit status=1) Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: Network UPS Tools - Riello USB driver 0.07 (2.8.0) Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: Warning: This is an experimental driver. Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: Some features may not function correctly. Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: libusb1: Could not open any HID devices: insufficient permissions on everything Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: No supported devices found. Please check your device availability with 'lsusb' Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: and make sure you have an up-to-date version of NUT. If this does not help, Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: try running the driver with at least 'subdriver', 'vendorid' and 'productid' Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: options specified. Please refer to the man page for details about these options Jul 23 20:49:08 nosec nut-driver@nutdev1[459394]: (man 8 riello_usb). Jul 23 20:49:08 nosec nut-driver@nutdev1[459320]: Driver failed to start (exit status=1) Jul 23 20:49:08 nosec nut-driver@nutdev1[459320]: Network UPS Tools - UPS driver controller 2.8.0 Jul 23 20:49:08 nosec systemd[1]: nut-driver: Control process exited, code=exited, status=1/FAILURE Jul 23 20:49:08 nosec systemd[1]: nut-driver: Failed with result 'exit-code'. Jul 23 20:49:08 nosec systemd[1]: Failed to start nut-driver - Network UPS Tools - device driver for nutdev1. Jul 23 20:49:08 nosec audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=nut-driver@nutdev1 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed' Jul 23 20:49:12 nosec systemd[1]: Stopped nut-driver - Network UPS Tools - device driver for nutdev1. Reproducible: Always perhaps unrelated small fix for 'grep: warning: stray \ before #' warning message: --- nut-driver-enumerator.sh_upto_2023.07.23 2023-07-22 23:07:52.000000000 +0200 +++ nut-driver-enumerator.sh 2023-07-23 19:38:28.368764126 +0200 @@ -832,7 +832,7 @@ -e 's,=\"\([^\ '"$TABCHAR"']*\)\"$,=\1,' \ -e 's,^\(\[[^]'"$TABCHAR"'\ ]*\]\)['"$TABCHAR"'\ ]*\(#.*\)*$,\1,' \ | grep -E -v '^$' \ - | grep -E '([\[\=]|^[^ '"$TABCHAR"']*$|^[^ '"$TABCHAR"']*[ '"$TABCHAR"']*\#.*$)' + | grep -E '([\[\=]|^[^ '"$TABCHAR"']*$|^[^ '"$TABCHAR"']*[ '"$TABCHAR"']*#.*$)' }