[nmglug] Really annoying beeps

[Tom Ashcraft]

Thank you Ted and Akkana.  Whenever my levels of Linux experience and 
imagination fail me and I receive a response to a nmglug question from 
either of you I always learn something new and useful.  Usually, more 
than one thing.

So I've been through everything both of you have mentioned and I've 
achieved partial success.  That is, I've identified three or four 
methods all of which appear to be functional with respect to turning 
off, or at least dramatically quieting, the intermittent instances of 
beeps associated with logging out.  I'll have to sift through my notes 
and recount these later when I have more time. Also there are a couple 
of fairly new Arch wiki pages I've found that go a long way towards 
reiterating and clarifying things for me.  Again, perhaps more on that 
later.

But the most glaring and mystifying issue, i.e. the (loudest) beep upon 
unplugging and replugging the exernal power supply/battery charger 
remains.  Nothing makes it go away.

My best guess is that because this is a laptop there is no dedicated 
beep speaker and everything does have to go through the sound card; and, 
the final nut I have to turn is figuring out how to identify which ALSA 
channel, if any, is responsible for delivering the offending behavior.  
Despite my best but limited efforts so far it's just not clearly apparent.

Configuring ALSA competently is a bit beyond my pay grade but I expect 
the required information may be found somewhere among these links:

https://wiki.archlinux.org/title/Disable_PC_speaker_beep

https://wiki.archlinux.org/title/Advanced_Linux_Sound_Architecture#Unmuting_the_channels

https://en.wikipedia.org/wiki/Advanced_Linux_Sound_Architecture#Applications

Tom

On 6/11/22 17:18, Tom Ashcraft wrote:
> I've got a nice little Acer netbook (maybe twelve years old?) that I 
> use mainly for car camping and when I want to use a computer at the 
> library.
>
> The problem is that *sometimes* when I use the 'action button' icon 
> from either the 'main menu' or the 'panel' to suspend, shutdown, etc.; 
> or, if I have to plugin or unplug the external charger/power supply 
> for whatever reason, it emits an ear-splitting beep that makes anyone 
> nearby jump right out of their skin and develop an instant case of PTSD.
>
> Does anyone know how I can disable this?
>
>        _,met$$$$$gg.          toma at 11debXfceAO722
>     ,g$$$$$$$$$$$$$$$P.       -------------------
>   ,g$$P"     """Y$$.".        OS: Debian GNU/Linux 11 (bullseye) x86_64
>  ,$$P'              `$$$.     Host: AO722 V1.01
> ',$$P       ,ggs.     `$$b:   Kernel: 5.10.0-14-amd64
> `d$$'     ,$P"'   .    $$$    Uptime: 51 mins
>  $$P      d$'     ,    $$P    Packages: 1891 (dpkg)
>  $$:      $$.   -    ,d$$'    Shell: bash 5.1.4
>  $$;      Y$b._   _,d$P'      Resolution: 1366x768
>  Y$$.    `.`"Y$$$$P"'         DE: Xfce 4.16
>  `$$b      "-.__              WM: Xfwm4
>   `Y$$                        WM Theme: Default
>    `Y$$.                      Theme: Adwaita-dark [GTK2/3]
>      `$$b.                    Icons: Papirus-Dark [GTK2/3]
>        `Y$$b.                 Terminal: guake
>           `"Y$b._             CPU: AMD C-50 (2) @ 1.000GHz
>               `"""            GPU: AMD ATI Radeon HD 6250
>                               Memory: 752MiB / 3658MiB
>
> Thanks,
>
> Tom
>
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