Just did a fresh install of Quantal and this issue is still present, so
thought I'd update the bug.
I am not seeing the "hpet increasing min_delta_ns" from the referenced
bug, so while perhaps related it seems to be a different issue.
To reproduce:
speaker-test -t sine -f 100
There will be intermittent periods of distortion in the left (0)
channel, that sounds like a sort of mechanical mincing / comb filter. I
could provide an audio sample if that would help.
The "nohz=off" boot param workaround still works.
** Tags added: quantal
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https://bugs.launchpad.net/bugs/814426
Title:
Crackling Sound on PCI card
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