On Tue, 18 Sep 2012, Doug Barton wrote: > Sometime in the last couple of months an old problem has resurfaced on > HEAD, a sort of squealing/whistling sound in the audio, even without > anything playing. The sound is similar to the wind whistling through > something. > > Before I blindly go off on a bisecting spree, does anyone have a > suggestion as to where I might look? It calls to mind this thread: http://lists.freebsd.org/pipermail/freebsd-current/2009-February/003608.html (with later followups http://lists.freebsd.org/pipermail/freebsd-current/2009-July/009839.html and http://lists.freebsd.org/pipermail/freebsd-current/2009-July/009850.html (and others?)) I had relief in my headphones with machdep.idle=spin, though that is only really useful when I am not paying my electricity bill... I agree with Matt that the noise is physically coming from analog leakage/crosstalk, and a software remedy will be something like disabling unused lines/pins. -Ben KadukReceived on Wed Sep 19 2012 - 16:06:20 UTC
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