[Bug 208791] USB audio playback issue

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Jul 26 01:07:02 UTC 2016


--- Comment #2 from alex at inferiorhumanorgans.com ---
With this kernel:

FreeBSD bloaty 10.3-RELEASE-p4 FreeBSD 10.3-RELEASE-p4 #0: Sat May 28 12:23:44
UTC 2016     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC 

And hw.snd.verbose=4

I see:

pcm3: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=0, old=0
delta=0 amt=0 ready=4236 free=0

With hw.usb.uaudio.debug=15

I see:

uaudio_chan_play_sync_callback: Comparing 44149 Hz :: 44100 Hz

This doesn't appear to vary, and has appeared consistent with the 10.3 kernels.
 The same hardware worked without fault in 9.x.  Sorry for the delay, but this
machine is unsuitable for audio playback currently so I've not tried in a

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