[Nut-upsuser] Problem making usbhid-ups working on Centos 5.7

[Charles Lepple]

On Apr 23, 2014, at 3:47 AM, Frantz de Germain wrote:

> I've compiled and installed nut-2.7.2 on a Xen server (Actually XCP
> 1.6/Centos 5.7) to manage a Dell UPS 2700W.
> 
> Here is my ups.conf :
> 
> [SU27003U-08]
>        driver = usbhid-ups
>        port = auto
>        desc = "SU27003U-08"
> 
> 52-nut-usbups.rules have well been installed in /lib/udev/rules.d/. I've put
> it in /etc/udev/rules.d/ too.
> 
> I've rebooted the machine.
> 
> I've the following error :
> 
> # upsdrvctl -u ups start
> Network UPS Tools - UPS driver controller 2.7.2
> Network UPS Tools - Generic HID driver 0.38 (2.7.2)
> USB communication driver 0.32
> No matching HID UPS found
> Driver failed to start (exit status=1)
> 
> With root it is ok :
> 
> # /usr/bin/usbhid-ups -a SU27003U-08 -u root
> Network UPS Tools - Generic HID driver 0.38 (2.7.2)
> USB communication driver 0.32
> Using subdriver: MGE HID 1.33
> 
> 
> Files /dev/bus/usb/00* are always owned by root with group root, despite the
> 52-nut-usbups.rules file.
> 
> 
> lsusb gives :
> 
> Bus 001 Device 008: ID 047c:ffff Dell Computer Corp. 

Thanks for a thorough problem report.

What version of udev and Linux kernel does your system use? (Alternatively, is there a URL that lists package versions for CentOS, similar to http://packages.debian.org/nut?)

Could you please run udevd in debug mode while plugging in the UPS? This message shows what happens when udev properly detects the UPS and changes permissions on the /dev nodes:

http://article.gmane.org/gmane.comp.monitoring.nut.devel/6558

-- 
Charles Lepple
clepple at gmail