[Nut-upsuser] Can't claim USB device: Invalid parameter

Wed Feb 7 17:57:57 GMT 2024

Hello and welcome!

  My guess would be that a nut-driver service unit (or instances thereof
since NUT v2.8.0, monolithic before) have started and captured the devices,
so your attempts with another copy of the driver started from CLI fail at
that. Normally drivers detect an older sibling running (by poking a PID
file), but service units may forgo creation of one. (Since 2.8.1 they can
also try to use driver-server protocol locally.)

  Since NUT v2.8.0 there is a nut-driver-enumerator (script and service)
which manages creation, deletion and reloading/restarting of unit instances
based on ups.conf contents (start-up) or changes (run-time). Check if you
have `nut-driver at PowervarUPS01.service` (and `... at APCUPS01`) there to fit
this bill? If yes, then to experiment with CLI copies of drivers,
`systemctl stop` such unit(s).

Hope this helps,
Jim Klimov

On Wed, Feb 7, 2024, 14:48 Jason Doolittle <jason at flintegratedtech.com>
wrote:

> I am working in Ubuntu Linux on a Raspberry Pi 5. Nut is unable to connect
> to USB UPSs.
>
> uname -srvmpio
> Linux 6.5.0-1009-raspi #12-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 17 11:45:08
> UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
>
> Current Installed version of nut is 2.8.0-7 installed with apt
>
> apt-cache policy nut
> nut:
>   Installed: 2.8.0-7
>   Candidate: 2.8.0-7
>   Version table:
> *** 2.8.0-7 500
>         500 http://ports.ubuntu.com/ubuntu-ports mantic/main arm64
> Packages
>         100 /var/lib/dpkg/status
>
> I currently have 2 UPSs connected to the system
> A Powervar UPM UPS
> Bus 003 Device 002: ID 4234:0002 AMETEK-POWERVAR Corporation UPM UPS
> (v01.51, Nov  3 2018)
>
> An APC Back-UPS Pro 1500
> Bus 001 Device 002: ID 051d:0002 American Power Conversion Uninterruptible
> Power Supply
>
> It appears that the all of the permissions were set up correctly during
> installation. The nut user and group were created and the usb devices have
> the correct ownership and permissions set per the udev rules
>
> For the Powervar:
> crw-rw-r-- 1 root nut 189, 257 Feb  7 06:42 /dev/bus/usb/003/002
>
> For the APC:
> crw-rw-r-- 1 root nut 189, 1 Feb  7 06:42 /dev/bus/usb/001/002
>
> In ups.conf, I have this:
>
> [PowervarUPS01]
> driver = "usbhid-ups"
> port = "auto"
> vendorid = "4234"
> productid = "0002"
>
> [APCUPS01]
> driver = "usbhid-ups"
> port = "auto"
> vendorid = "051D"
> productid = "0002"
>
> The UPSs are matched, but drivers continuously fail to start. Here is the
> output from running the usbhid-ups driver manually for the Powervar:
>
> sudo /usr/lib/nut/usbhid-ups -u root -a PowervarUPS01 -DD
>
> Network UPS Tools - Generic HID driver 0.47 (2.8.0)
> USB communication driver (libusb 1.0) 0.43
>    0.000000 [D1] debug level is '2'
>    0.001191 [D2] Initializing an USB-connected UPS with library
> libusb-1.0.26 (API: 0x1000109) (NUT subdriver name='USB communication
> driver (libusb 1.0)' ver='0.43')
>    0.001209 [D1] upsdrv_initups (non-SHUT)...
>    0.006358 [D2] Checking device 1 of 6 (1D6B/0003)
>    0.006385 [D1] Failed to open device (1D6B/0003), skipping: Access
> denied (insufficient permissions)
>    0.006393 [D2] Checking device 2 of 6 (4234/0002)
>    0.007354 [D2] - VendorID: 4234
>    0.007364 [D2] - ProductID: 0002
>    0.007371 [D2] - Manufacturer: AMETEK-POWERVAR Corporation
>    0.007378 [D2] - Product: UPM UPS (v01.51, Nov  3 2018)
>    0.007385 [D2] - Serial Number: 5008094R-1940438
>    0.007395 [D2] - Bus: 003
>    0.007402 [D2] - Device: unknown
>    0.007409 [D2] - Device release number: 0002
>    0.007418 [D2] Trying to match device
>    0.007425 [D2] match_function_subdriver (non-SHUT mode): matching a
> device...
>    0.007485 [D2] Device matches
>    0.007497 [D2] Reading first configuration descriptor
>    0.007505 [D2] result: -5 (Entity not found)
>    0.007517 [D2] failed to claim USB device: Entity not found
>    0.007529 [D1] failed to detach kernel driver from USB device: Invalid
> parameter
>    0.007539 [D2] failed to claim USB device: Entity not found
>    0.007549 [D1] failed to detach kernel driver from USB device: Invalid
> parameter
>    0.007560 [D2] failed to claim USB device: Entity not found
>    0.007574 [D1] failed to detach kernel driver from USB device: Invalid
> parameter
>    0.007582 [D2] failed to claim USB device: Entity not found
>    0.007594 [D1] failed to detach kernel driver from USB device: Invalid
> parameter
>    0.007604 Can't claim USB device [4234:0002]@1/0: Invalid parameter
>
> I get basically the same from the APC.
>
> I think the "failed to detach kernel driver from USB device: Invalid
> parameter" is the key here, especially the "Invalid parameter" part, but
> after a few hours of poking at things, I haven't made any progress.
>
> I would be eternally grateful if someone could point me in the right
> direction.
>
> _______________________________________________
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>
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