[Nut-upsuser] UPS configuration issue?

[Greg Troxel]

A lot of what you are running into seems like bugs in the centos
package.  I would guess you should report this to centos.

2.8 is old; 2.8.3 was just released.

nut tends to be run not as root, so you probably need to arrange for the
nut user to have permissions on the USB device.

    [root at mustang ups]# /sbin/nutdrv_qx -DD -a nutdev1
    Network UPS Tools - Generic Q* USB/Serial driver 0.32 (2.8.0)
    USB communication driver (libusb 0.1) 0.43
       0.000000     [D1] debug level is '2'
       0.001243     [D1] upsdrv_initups...
       0.007948     [D2] Checking device (8087/0AA7) (001/005)
       0.008175     [D1] Failed to open device (8087/0AA7), skipping:
       Permission denied

Check that you are not using any kind of additional permission/security
scheme and if so that it allows nut to access the device.