pistas-y580 ~]# systemctl start bumblebeed
[pistas-y580 ~]# optirun glxgears -info
[ 6698.935973] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
[ 6698.936013] [ERROR]Could not connect to bumblebee daemon - is it running?
[pistas-y580 ~]# systemctl status bumblebeed
● bumblebeed.service - Bumblebee C Daemon
   Loaded: loaded (/usr/lib/systemd/system/bumblebeed.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2019-08-20 22:21:49 CEST; 1h 1min ago
 Main PID: 3378 (bumblebeed)
    Tasks: 1 (limit: 4915)
   Memory: 1.9M
   CGroup: /system.slice/bumblebeed.service
           └─3378 /usr/bin/bumblebeed --use-syslog

aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) NVIDIA(GPU-0): Failed to acquire modesetting permission.
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) NVIDIA(0): Failing initialization of X screen 0
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) Screen(s) found, but none have a usable configuration.
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE)
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) no screens found(EE)
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE)
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) Please also check the log file at "/var/log/Xorg.8.log" for additional information.
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE)
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: [XORG] (EE) Server terminated with error (1). Closing log file.
aug 20 22:37:47 pistas-y580 bumblebeed[3378]: X did not start properly