[SATLUG] USB microphone issue
bruce.dubbs at gmail.com
Fri Nov 11 17:32:50 CST 2011
Igor Gueths wrote:
> Hi all,
> I managed to get to the bottom of this issue after all; as it turned
> out, I was apparently on the right track as far as the EHCI frame
> scheduling issue. The main problem is that the bug, introduced around
> 2.6.39 or so (maybe a bit earlier), causes hub contention when a high
> speed and full speed USB device are plugged into the same hub; this
> actually applied to me, since I had completely forgotten my in-built
> webcam is on the same hub I was trying to use for the microphone.
> IN summary, plugging the microphone into one of the rear ports caused
> everything to work as expected, vs one of the side ones that I was
> previously trying to use. Just thought I'd briefly write about this in
> case someone else down the line runs into what I think is a fairly
> obscure issue.
Wow, that is an obscure issue. Good work in figuring it out.
Do you know if the problem is fixed in later kernels? Linux-3.1.1 was
More information about the SATLUG