On 07/10/2016 06:44, cwl...@mst.edu wrote:
Synopsis:       video(1) fails to open webcam interface
Category:       system
        System      : OpenBSD 6.0
        Details     : OpenBSD 6.0-current (GENERIC.MP) #2533: Wed Oct  5
16:23:11 MDT 2016

        Architecture: OpenBSD.amd64
        Machine     : amd64
When I execute video(1) on this system using my Logitech c270 Webcam, I get
        the error in subject line. The webcam activation light flashes on for
half a second,
        but does not stay. A line is entered in dmesg(1) that says:
        'uvideo0: unable to open VS PIPE: INVAL'.
        Oddly, this webcam works perfectly on my Thinkpad running the 6.0
release, but not
with this hardware running 6.0. I have tried with the most recent snapshot, but
        no luck.
        Use video(1) with a Logitech c270 with similar hardware. I'm sorry
that's probably

That's because xhci(4) lacks support for isochronous transfers. Somebody has to write that code in order to support uvideo(4) and uaudio(4) devices attached to USB3 Host Controllers.

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