Tested again after kernel jump to 5.3 (5.3.0-26-generic): still a
problem. Nice "optimisation" fellas. I guess most of the world doesn't
experience this because they are either have grounded speakers or a
motherboard that grounds the output, so they don't hear a buzz when a
signal isn't coming
I've just tested this again after upgrading to kernel 5.0.0-31 - the
problem is still here. Sound device goes into "powersave" after 6 to 7
seconds without sound output, which is audible on non-grounded speakers
as a buzzing noise. As in my comment #29, turning off the power
"optimisation" fixes
I had this problem after upgrading kernel to 5.0.0-23 and the workaround
in comment #5 (turning off the Intel power optimisation) worked for me.
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