Re: WebkitGTK-based browsers: System volume suddenly maxed out when playing audio or video

[raingloom]

On Mon, 2020-01-06 at 18:02 +0000, Alek Zikon wrote:
> Everytime audio or video starts playing on WebkitGTK-based browsers
> (epiphany, next), the system volume is maxed out. This happens when
> you start the audio or video by clicking on the play button and also
> when audio or videos are played automatically (in a playlist, or ad
> videos, for example).
> 
> This issue has been reported before upstream, but epiphany people say
> the source of the problem is in pulsaudio defaults on distros (
> https://gitlab.gnome.org/GNOME/epiphany/issues/73):
> 
>   Thanks for reporting this issue. You'll need to ask Debian to
> disable
>   PulseAudio's flat volumes feature, as is done by all other major
>   distributions (Ubuntu, Arch, Fedora, openSUSE, probably more),
>   since we're not going to make any changes here.
> 
> I found that there is a related pulsaudio bug reported on Guix (
> https://issues.guix.gnu.org/issue/38172). Unfortunately, this issue
> is still open.
> 
> Epiphany people say you, as a user, can work around the issue by
> setting "flat-volumes = no in your /etc/pulse/daemon.conf." What's
> the correct way to this on the Guix System?
> 
> 
> I'm using this software:
> 
> epiphany 3.30.4
> WebKitGTK+ 2.26.1
> GNOME 3.30.2
> 
> $ guix describe
> Generation 16 Jan 03 2020 14:36:37    (current)
>   guix 7158fe4
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     branch: master
>     commit: 7158fe4ded47a599ceb8d556132ba83fcc686962
> 
CC-ing https://issues.guix.gnu.org/issue/38172