On Jun 19, 2017, at 7:56 PM, Manuel Wolfshant wrote: > > On 06/20/2017 02:27 AM, Charles Lepple wrote: >> 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. > > That's greek to me, I am completely unfamiliar to any of nut ( and its > drivers ) internals :) But if I can configure usbhid-ups in a different > manner which I did not spot from the docs, please point me to the correct > docs.
No configuration needed - the driver tries both methods: 1.013273 HID descriptor length (method 1) -1 1.013277 i=0, extra[i]=09, extra[i+1]=21 1.013283 HID descriptor, method 2: (9 bytes) => 09 21 10 01 21 01 22 25 02 1.013287 HID descriptor length (method 2) 549 1.013290 HID descriptor length 549 1.013920 Unable to get Report descriptor: Broken pipe It does not get a length for method 1, so it moves on to method 2, which gets a length, but fails to get the rest of the descriptor. This is what is happening to lsusb, too (tries to fetch 549 bytes, gets only 9). > However I am using the very same package on my personal workstation (which is > also running CentOS 6 but has a whole lot of packages installed either from > 3rd party repos or built by me ) since Fri 09 Jan 2015 (I needed it for > heimdall ) and I had zero issues so far. Can you be more specific about this? What hardware are you testing libusbx 1.0.19 with? _______________________________________________ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
