From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dimakakos Dimos <bendersteed@gmail.com>
Subject: Re: GNOME: System sound suddenly stopped working and sound controls
 are disabled
Date: Fri, 10 Jan 2020 00:10:45 +0200
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sirgazil writes:
> I guix pulled, reconfigured the system and upgraded my profile packages yesterday. After rebooting, I had sound. But today, I logged out, and then logged back in and sound was lost. Additionally, GNOME sound controls look grayed out (https://multimedialib.files.wordpress.com/2020/01/sound-controls-disabled-2020-01-09.png) and turning up the volume there does nothing.
>
> Anyone else has this problem?

I've encountered this problem lately, though it has occured like three
times and I haven't pinpointed the issue. It usually happens after a long
time of uptime in a gnome session and logging out and back in fixes it.

I'll try to provide more info when this happens again.