Hi Edgar, Thanks for the explanation. On Mon, 4 Sep 2017, Edgar Thier wrote: > Hi Guennadi, > > The cameras in question are USB-3.0 industrial cameras from The Imaging Source. > The ones I tested were the DFK UX250 and DFK UX264 models. > I do not know if there are other devices that have the AUTO_UPDATE flag for various properties. > > Since I received no immediate answer I tried fixing it myself. > The result can be found here: > https://patchwork.linuxtv.org/patch/43289/ But that patch only re-reads the flags. What does that give you? Do those flags change? In which way? As far as I understand the UVC Autoupdate feature, a change in GET_INFO data is only one possibility, (arguably) a more important one is changes in GET_CUR data. In either case, this should be implemented using the UVC Interrupt endpoint. Here's my latest asynchronous control patch: https://patchwork.linuxtv.org/patch/42800/ As you can see, it only handles the VALUE_CHANGE (GET_CUR) case. I would suggest implementing a patch on top of it to add support for INFO_CHANGE and you'd be the best person to test it then! Thanks Guennadi > Cheers, > > Edgar
