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...obtain this error (in /var/log/syslog): Dec 1 13:39:03 ubux upsmon[4561]: parent: Unable to call shutdown command: /usr/sbin/pm-hibernate Instead if I set this shutdown command: SHUTDOWNCMD "/sbin/shutdown -h now" everything works correctly. Any help? My nut version is 2.7.1 (autocompiled) My driver in use is "nutdrv_qx" Everything, except upsmon, seems working correctly.

...y system() is failing. > > You are right, nothing is obvious, especially in this context. I will try to do what you say (I hope to find some help in some documentation file). It seems only shutdown command works. Nor scripts neither other commands are executed. With NUT version 2.6.3 (not autocompiled but from Ubuntu 12.04 repositories) instead all works fine. Therefore I think this problem is not related to AppArmor or Selinux.

I installed CentOS 6 on a Dell Optiplex 790 with a StarTech.com dual serial port card, and the serial ports aren't being recognized. According to dmesg, only the built-in serial port is being recognized: # dmesg | fgrep ttyS serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A And lspci -v doesn't show that any drivers are loaded for it: