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Message #02016
[Bug 984603] Re: Skype video freezes right after few first frames
I spoke too soon - the backported driver updates certainly helped, but I
have now realised that Skype was only working with an external analogue
microphone. When asked to use the webcam's built-in microphone, I was
back to freezing images - unless I defocussed the images, in which case
it worked! Some bandwidth issues then .... Hans was once again very
helpful, and correctly suggested
This sounds like your setup has an usb-2.0 hub between the
camera and the root-hub (*). This means that you either have a
intel sandybridge machihine, where such a hub is integrated
into the chipset, or you have put a hub in between yourself.
*) Unfortunately the linux EHCI scheduling code deals poorly
with multiple isoc stream to a USB-1 device attached through a
USB-2 hub.
This was indeed the problem - I have a Sandybridge chipset. Apparently
there are no known workarounds (apart from making sure your webcam is
not a USB-1 device, or using an external microphone). My best guess is
that the bug reports relating to "skype only, other apps work fine" are
probably better labelled as "combined video and audio from the same
USB-1 device only, video only apps work fine".
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https://bugs.launchpad.net/bugs/984603
Title:
Skype video freezes right after few first frames
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References