[Nut-upsuser] Problems with usbhid-ups and CyberPower CP1500 on 2.6.0

Arjen de Korte nut+users at de-korte.org
Thu Mar 17 16:17:42 UTC 2011

Citeren Charles Lepple <clepple op gmail.com>:

>>>> If I run it under strace, the ioctls on the /dev/bus/usb file descriptor
>>>> preceeding each "operation not permitted" error return 0, not an  
>>>> error code
>>>> such as EPERM.
>>> That seems strange. Would you please compress and send the strace output
>>> (without "-u root")?
>> Attached.
> Looks like Ubuntu fixed 2.4.3 here:
> https://bugs.launchpad.net/ubuntu/+source/nut/+bug/572262
> That was committed to NUT here:
> http://trac.networkupstools.org/projects/nut/changeset/2407
> This breaks reading larger reports, so it was reverted:
> http://trac.networkupstools.org/projects/nut/changeset/2719
> This patch (committed after 2.6.0 was released) claims to restore
> 2.4.1 behavior:
> http://trac.networkupstools.org/projects/nut/changeset/2893

All of the above are irrelevant here. The driver runs fine when  
started as root, so this must be a permissions problem.

Best regards, Arjen
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