Hi! It may be important for systemd users: nut-2.7.3 works fine with Requires=nut-driver.service string in the nut-server.service file. It comes with commented string. Otherwise systemd says nut-drivers service is unneeded anymore and finishes it. I looked at the source of nut-2.7.4 and it has correct nut-server.service Steps to reproduce: 1. Obtain >=sys-apps/systemd-228-r1 2. Install nut-2.7.4 3. Run systemctl restart nut-driver nut-server 4. Check the UPS by upsc ups_name #systemctl status nut-driver nut-server ● nut-driver.service - Network UPS Tools - power device driver controller Loaded: loaded (/etc/systemd/system/nut-driver.service; static; vendor preset: enabled) Active: inactive (dead) since Wed 2016-03-16 04:39:46 ALMT; 26s ago Process: 6647 ExecStop=/usr/sbin/upsdrvctl stop (code=exited, status=0/SUCCESS) Process: 6639 ExecStart=/usr/sbin/upsdrvctl start (code=exited, status=0/SUCCESS) Main PID: 6646 (code=exited, status=0/SUCCESS) Mar 16 04:39:44 gentoo upsdrvctl[6639]: No values provided for battery high/low voltages in ups.conf Mar 16 04:39:44 gentoo upsdrvctl[6639]: Using 'guestimation' (low: 10.400000, high: 13.000000)! Mar 16 04:39:44 gentoo upsdrvctl[6639]: Battery runtime will not be calculated (runtimecal not set) Mar 16 04:39:44 gentoo blazer_usb[6646]: Startup successful Mar 16 04:39:44 gentoo systemd[1]: Started Network UPS Tools - power device driver controller. Mar 16 04:39:44 gentoo systemd[1]: nut-driver.service: Unit not needed anymore. Stopping. Mar 16 04:39:44 gentoo upsdrvctl[6639]: Network UPS Tools - UPS driver controller 2.7.3 Mar 16 04:39:44 gentoo systemd[1]: Stopping Network UPS Tools - power device driver controller... Mar 16 04:39:44 gentoo upsdrvctl[6647]: Network UPS Tools - UPS driver controller 2.7.3 Mar 16 04:39:46 gentoo systemd[1]: Stopped Network UPS Tools - power device driver controller. ● nut-server.service - Network UPS Tools - power devices information server Loaded: loaded (/usr/lib/systemd/system/nut-server.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2016-03-16 04:39:46 ALMT; 26s ago Process: 6650 ExecStart=/usr/sbin/upsd (code=exited, status=0/SUCCESS) Main PID: 6651 (upsd) CGroup: /system.slice/nut-server.service └─6651 /usr/sbin/upsd Mar 16 04:39:46 gentoo upsd[6650]: ACL in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:39:46 gentoo upsd[6650]: ACL in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:39:46 gentoo upsd[6650]: ACCEPT in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:39:46 gentoo upsd[6650]: REJECT in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:39:46 gentoo upsd[6650]: listening on 127.0.0.1 port 3493 Mar 16 04:39:46 gentoo systemd[1]: Started Network UPS Tools - power devices information server. Mar 16 04:39:46 gentoo upsd[6650]: Can't connect to UPS [volta] (blazer_usb-volta): No such file or directory Mar 16 04:39:46 gentoo upsd[6650]: allowfrom in upsd.users is no longer used Mar 16 04:39:46 gentoo upsd[6651]: Startup successful Mar 16 04:39:48 gentoo upsd[6651]: User galym@127.0.0.1 logged into UPS [volta] And after uncommenting mentioned string I restarted it: ed Mar 16_04:43 AM#systemctl restart nut-driver nut-server Wed Mar 16_04:43 AM#systemctl status nut-driver nut-server ● nut-driver.service - Network UPS Tools - power device driver controller Loaded: loaded (/etc/systemd/system/nut-driver.service; static; vendor preset: enabled) Active: active (running) since Wed 2016-03-16 04:43:26 ALMT; 10s ago Process: 6689 ExecStart=/usr/sbin/upsdrvctl start (code=exited, status=0/SUCCESS) Main PID: 6691 (blazer_usb) CGroup: /system.slice/nut-driver.service └─6691 /lib64/nut/blazer_usb -a volta Mar 16 04:43:24 gentoo systemd[1]: nut-driver.service: Failed to enqueue stop job, ignoring: Transaction is destructive. Mar 16 04:43:24 gentoo systemd[1]: Starting Network UPS Tools - power device driver controller... Mar 16 04:43:25 gentoo upsdrvctl[6689]: Supported UPS detected with mustek protocol Mar 16 04:43:26 gentoo upsdrvctl[6689]: Vendor information unavailable Mar 16 04:43:26 gentoo upsdrvctl[6689]: No values provided for battery high/low voltages in ups.conf Mar 16 04:43:26 gentoo upsdrvctl[6689]: Using 'guestimation' (low: 10.400000, high: 13.000000)! Mar 16 04:43:26 gentoo upsdrvctl[6689]: Battery runtime will not be calculated (runtimecal not set) Mar 16 04:43:26 gentoo blazer_usb[6691]: Startup successful Mar 16 04:43:26 gentoo systemd[1]: Started Network UPS Tools - power device driver controller. Mar 16 04:43:27 gentoo upsdrvctl[6689]: Network UPS Tools - UPS driver controller 2.7.3 ● nut-server.service - Network UPS Tools - power devices information server Loaded: loaded (/usr/lib/systemd/system/nut-server.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2016-03-16 04:43:26 ALMT; 10s ago Process: 6692 ExecStart=/usr/sbin/upsd (code=exited, status=0/SUCCESS) Main PID: 6693 (upsd) CGroup: /system.slice/nut-server.service └─6693 /usr/sbin/upsd Mar 16 04:43:27 gentoo upsd[6692]: fopen /var/lib/nut/upsd.pid: No such file or directory Mar 16 04:43:27 gentoo upsd[6692]: ACL in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:43:27 gentoo upsd[6692]: ACL in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:43:27 gentoo upsd[6692]: ACL in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:43:27 gentoo upsd[6692]: ACCEPT in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:43:27 gentoo upsd[6692]: REJECT in upsd.conf is no longer supported - switch to LISTEN Mar 16 04:43:27 gentoo upsd[6692]: listening on 127.0.0.1 port 3493 Mar 16 04:43:27 gentoo upsd[6692]: Connected to UPS [volta]: blazer_usb-volta Mar 16 04:43:27 gentoo upsd[6692]: allowfrom in upsd.users is no longer used Mar 16 04:43:28 gentoo upsd[6693]: User galym@127.0.0.1 logged into UPS [volta] Now it works.
This appears to be correct. nut-driver is set to stop itself if it is unneeded, and nut-server says it doesn't need it, so nut-driver happily commits suicide. Adding this to a drop-in fixes the issue: [Unit] Requires=nut-driver.service It worked fine in 2.6.5, and it looks like 2.7.4 fixes it as well...
