[Nut-upsuser] Unable to use nut-2.7.4 with Eaton 5E1500I USB

[Charles Lepple]

On Jun 19, 2017, at 10:45 AM, Manuel Wolfshant wrote:
> 
> #lsusb -vvv -d 0463:ffff
> 
> Bus 002 Device 012: ID 0463:ffff MGE UPS Systems UPS
...
>       HID Device Descriptor:
>          bLength                 9
>          bDescriptorType        33
>          bcdHID               1.10
>          bCountryCode           33 US
>          bNumDescriptors         1
>          bDescriptorType        34 Report
>          wDescriptorLength     549
>          Warning: incomplete report descriptor
>          Report Descriptor: (length is 9)
>            Item(Main  ): (null), data=none
>            Item(Main  ): (null), data=none
>            Item(Main  ): (null), data=none
> 
If I recall, this is equivalent to the usbhid-ups "method 2" approach to retrieving the descriptor. 


>> If not (lsusb returns "Report Descriptors:" / "** UNAVAILABLE **"), it seems like the two options are to upgrade the kernel (which I understand is an issue),
> 
> unfortunately it is. If mandatory I guess I can do some tricks with cron to rollback a known good situation but given that I have no idea what failed during the previous attempt ( nothing got logged -- I suspect a kernel panic although I have no idea why would this happen ) I'd prefer to avoid, if possible.
> 
> 
>>  or try to roll back the userspace tools to match what was current when the kernel was current.
>> 
> I am afraid I did not understand this part...

If there are newer kernels out there, it is possible that some of the userspace tools (usbutils, libusb, etc.) are expecting a newer kernel. Is it possible to downgrade any of them, to test with package versions that were released at the same time as the 2.6.32 kernel?