Here is the problem:
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/blob/master/src/utils/pactl.c
In src/utils/pactl.c:
Between line 2530 and line 2535, in function parse_volume:
These two 'if' statements will BOTH execute if the input string contains
both a '.' and ends with a '%'.
This results in vol_flags having VOL_PERCENT and VOL_LINEAR or'd in and
set, which is equivalent in effect to '*vol_flags |= VOL_DECIBEL'
(because VOL_PERCENT is 1 and VOL_LINEAR is 2, and VOL_DECIBEL is 3.
Refer to line 76)
So from then on the function is erroneously acting as if the input
string was a decibel value, instead of a percentage.
Suggested fix:
Change line 2532 from this
if (pa_endswith(vs, "%")) {
To this:
else if (pa_endswith(vs, "%")) {
I apologise for my rudeness earlier but this was not the first time
pulseaudio bugs have BLASTED EXTREMELY LOUD NOISE AT 100% THROUGH MY
HEADPHONES and I was very upset.
I don't have a git account or any of the stuff necessary to actually
submit a patch so I would appreciate if someone or pulseaudio dev would
take note of this and make the necessary change
