On 07/10/2016 06:44, cwl...@mst.edu wrote:
Synopsis: video(1) fails to open webcam interface
Category: system
Environment:
System : OpenBSD 6.0
Details : OpenBSD 6.0-current (GENERIC.MP) #2533: Wed Oct 5
16:23:11 MDT 2016
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
Architecture: OpenBSD.amd64
Machine : amd64
Description:
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.
How-To-Repeat:
Use video(1) with a Logitech c270 with similar hardware. I'm sorry
that's probably
unhelpful.
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.
