I've just discovered that, despite my earlier testing, the bug is now
also happening on linux-image-4.9.71-040971-generic. I'm going to mark
as incomplete once more until I can further narrow down the issue.
One other element that might be relevant is that I'm using two video
ports: an HDMI port for video, and a DisplayPort cable for audio. In my
current round of tests, running both streams over one cable seems to
address the issue (but has not always done so), and changing to an
interlaced resolution (1080 to 1080i) also seems to fix it (the regular
screen is jittery, but YouTube video is clear).
I will test for a few days and with different kernels to see if I can
isolate the problem and update the bug with my results.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1739678
Title:
HDMI audio makes loud popping noises while playing audio
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