PC speaker: Difference between revisions
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[[es:PC speaker]] | [[es:PC speaker]] | ||
[[ja:PC スピーカー]] | [[ja:PC スピーカー]] | ||
[[ru:PC speaker]] | [[ru:PC speaker]] | ||
[[zh-hans:PC speaker]] | [[zh-hans:PC speaker]] | ||
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{{Related articles end}} | {{Related articles end}} | ||
Ever since the first IBM PC most PCs have a built-in '''PC speaker''' (or ''beeper'') which may produce beeps. This speaker is not capable of high quality playback and merely serves as a simple means of auditory feedback in the form of beeps. Some software, e.g. web browsers, editors and terminals, may produce beeps which may or may not be desired by the user. Hence this article serves as a guide on how to configure or even disable those beeps. | |||
For situations where no sound card or speakers are available and a simple audio notification is desired, see [[#Beep]]. | |||
== Mechanism == | |||
== | The PC speaker is typically a physical unit connected on the front connections header of the motherboard. Some motherboard manufacturers do not ship their motherboards with a PC speaker at all, whereas others may have the PC speaker soldered directly onto the surface. Laptops typically have no physical PC speaker but have the beeper routed to the laptop's internal speakers. In some cases, the beeper is heard on the regular output (i.e. speakers, headphones) of the soundcard, which tends to be unexpectedly loud. | ||
Upon boot the BIOS will traditionally generate a beep during [[Wikipedia:Power-on self-test|POST]]. More recent motherboard models omit the POST beep in favor of rapidly booting into the OS. The BIOS typically allows for toggling the POST beeps but it cannot configure the PC speaker to be turned off completely. | |||
Once the system has booted into Linux and the {{ic|pcspkr}} [[kernel module]] is loaded, the PC speaker can be used by the environment, be invoked manually by the user, and be configured to some extent. Because the PC speaker is controlled directly by the CPU, along with the fact that they are built for beeping only, PC speakers cannot be used for playing back audio files. If this is really desired, unloading {{ic|pcspkr}} and [[install]]ing {{AUR|snd-pcsp-dkms}} provides a rudimentary audio output. | |||
== Disabling the PC speaker == | |||
Turning off a particular instance of a sound, while leaving the others operational, is possible if and only if one can identify which portion of the environment generates the particular sound. This allows customizing the selection of sounds. Please feel free to add any configurations and settings to this wiki page that may be useful for other users. | Turning off a particular instance of a sound, while leaving the others operational, is possible if and only if one can identify which portion of the environment generates the particular sound. This allows customizing the selection of sounds. Please feel free to add any configurations and settings to this wiki page that may be useful for other users. | ||
=== Physically === | |||
By removing the PC speaker the system will not be able to produce beeps. This can be achieved by physically removing the unit from the motherboard (if possible). Some manufacturers may provide a jumper header to switch it off. | |||
{{Warning|Removing the PC speaker is generally not recommended as it is a useful tool in diagnosing boot problems, after which it may produce a unique beeping pattern related to the source of fault (refer to your motherboard manual). A better solution is to turn off the POST beeps in the BIOS and blacklisting the beeper as written below. If you do however wish to remove it physically it is highly recommended to keep it at bay for this scenario.}} | |||
=== Globally === | === Globally === | ||
The PC speaker can be disabled by [[Kernel modules# | The PC speaker can be disabled by [[Kernel modules#Manual module handling|unloading]] the {{ic|pcspkr}} and {{ic|snd_pcsp}} [[kernel module]]s: | ||
{{Note|This will not disable your entire sound system, only the [[Wikipedia:PC speaker|PC speaker]].}} | |||
# rmmod pcspkr | # rmmod pcspkr | ||
# rmmod snd_pcsp | |||
[[Blacklisting]] the {{ic|pcspkr}} | [[Blacklisting]] the {{ic|pcspkr}} and {{ic|snd_pcsp}} modules will prevent [[udev]] from loading them at boot. [[Create]] the file: | ||
{{hc|/etc/modprobe.d/nobeep.conf| | {{hc|/etc/modprobe.d/nobeep.conf| | ||
blacklist pcspkr}} | blacklist pcspkr | ||
blacklist snd_pcsp | |||
}} | |||
[[ | [[Kernel modules#Using kernel command line_2|Blacklisting it on the kernel command line]] is yet another way. Simply add {{ic|1=module_blacklist=pcspkr,snd_pcsp}} to your bootloader's kernel line. | ||
=== Console === | === Console === | ||
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=== KDE Plasma === | === KDE Plasma === | ||
Bell notification settings can be modified in | Bell notification settings can be modified in ''System Settings > Accessibility Options > Bell''. | ||
=== Cinnamon === | === Cinnamon === | ||
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=== PulseAudio === | === PulseAudio === | ||
Play a sound instead of a PC speaker beep [[PulseAudio# | Play a sound instead of a PC speaker beep [[PulseAudio#X11 Bell Events|using PulseAudio]]. | ||
=== Arch Linux live ISO === | |||
You can patch the Arch Linux live ISO image (and other live images which play an init tune through [[GRUB]]) with the following command. | |||
{{Warning| | |||
* The input and output file names have to be different or it will erase the image. | |||
* While this has been tested on {{ic|archlinux-2023.12.01-x86_64.iso}} and does not have any side effect on it, running this command might corrupt your image. Only run it if you can afford to download a new one in that case. | |||
}} | |||
cat archlinux.iso | perl -pe 's/^play (([0-9]+ ?)+)/#lay \1/g' > archlinux-nobeep.iso | |||
== Beep == | == Beep == | ||
A user can create a short audible tone when logged in to a [[virtual console]]. See [[Wikipedia: | A user can create a short audible tone when logged in to a [[virtual console]]. See [[Wikipedia:Bell character#Usage]] for the details. | ||
Beep is an advanced PC speaker beeping program. It is useful for situations where no sound card and/or speakers are available, and simple audio notification is desired. | Beep is an advanced PC speaker beeping program. It is useful for situations where no sound card and/or speakers are available, and simple audio notification is desired. | ||
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To force reloading rules and device file to apply new user permission without a reboot, execute: | To force reloading rules and device file to apply new user permission without a reboot, execute: | ||
# udevadm control --reload && rmmod pcspkr && modprobe pcspkr | |||
=== Tips and | === Tips and tricks === | ||
While many people are happy with the traditional beep sound, some may like to change its properties a bit. The following example plays | While many people are happy with the traditional beep sound, some may like to change its properties a bit. The following example plays slightly higher and shorter sound and repeats it two times. | ||
# beep -f 5000 -l 50 -r 2 | # beep -f 5000 -l 50 -r 2 | ||
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* {{man|1|xset}}, {{man|1|setterm}}, {{man|1|bash}} | * {{man|1|xset}}, {{man|1|setterm}}, {{man|1|bash}} | ||
* https://github.com/NaWer/beep and https://github.com/ShaneMcC/beeps - repositories collecting bash scripts playing various music using beep |
Latest revision as of 16:48, 30 December 2023
Ever since the first IBM PC most PCs have a built-in PC speaker (or beeper) which may produce beeps. This speaker is not capable of high quality playback and merely serves as a simple means of auditory feedback in the form of beeps. Some software, e.g. web browsers, editors and terminals, may produce beeps which may or may not be desired by the user. Hence this article serves as a guide on how to configure or even disable those beeps.
For situations where no sound card or speakers are available and a simple audio notification is desired, see #Beep.
Mechanism
The PC speaker is typically a physical unit connected on the front connections header of the motherboard. Some motherboard manufacturers do not ship their motherboards with a PC speaker at all, whereas others may have the PC speaker soldered directly onto the surface. Laptops typically have no physical PC speaker but have the beeper routed to the laptop's internal speakers. In some cases, the beeper is heard on the regular output (i.e. speakers, headphones) of the soundcard, which tends to be unexpectedly loud.
Upon boot the BIOS will traditionally generate a beep during POST. More recent motherboard models omit the POST beep in favor of rapidly booting into the OS. The BIOS typically allows for toggling the POST beeps but it cannot configure the PC speaker to be turned off completely.
Once the system has booted into Linux and the pcspkr
kernel module is loaded, the PC speaker can be used by the environment, be invoked manually by the user, and be configured to some extent. Because the PC speaker is controlled directly by the CPU, along with the fact that they are built for beeping only, PC speakers cannot be used for playing back audio files. If this is really desired, unloading pcspkr
and installing snd-pcsp-dkmsAUR provides a rudimentary audio output.
Disabling the PC speaker
Turning off a particular instance of a sound, while leaving the others operational, is possible if and only if one can identify which portion of the environment generates the particular sound. This allows customizing the selection of sounds. Please feel free to add any configurations and settings to this wiki page that may be useful for other users.
Physically
By removing the PC speaker the system will not be able to produce beeps. This can be achieved by physically removing the unit from the motherboard (if possible). Some manufacturers may provide a jumper header to switch it off.
Globally
The PC speaker can be disabled by unloading the pcspkr
and snd_pcsp
kernel modules:
# rmmod pcspkr # rmmod snd_pcsp
Blacklisting the pcspkr
and snd_pcsp
modules will prevent udev from loading them at boot. Create the file:
/etc/modprobe.d/nobeep.conf
blacklist pcspkr blacklist snd_pcsp
Blacklisting it on the kernel command line is yet another way. Simply add module_blacklist=pcspkr,snd_pcsp
to your bootloader's kernel line.
Console
You can add this command in /etc/profile
or a dedicated file like /etc/profile.d/disable-beep.sh
:
setterm -blength 0
Another way is to uncomment or add this line in /etc/inputrc
or ~/.inputrc
:
set bell-style none
Less pager
To disable PC speaker in less pager, you can launch it with less -q
to mute PC speaker for end of line events or less -Q
to mute it altogether. For man pages, launch man -P "less -Q"
or set the $MANPAGER
or $PAGER
environment variables.
Alternatively, you can add these lines to your ~/.bashrc
:
alias less='less -Q' alias man='man -P "less -Q"'
Xorg
$ xset -b
You can add this command to a startup file such as /etc/xprofile
to make it permanent. See xprofile for more information.
ALSA
For most sound cards the PC speaker is listed as an ALSA channel, named either PC Speaker, PC Beep, or Beep. To mute the speaker, either use alsamixer
or amixer
, for example:
$ amixer set 'PC Speaker' 0% mute
To unmute the channel, see Advanced Linux Sound Architecture#Unmuting the channels.
GNOME
Using GSettings:
$ gsettings set org.gnome.desktop.wm.preferences audible-bell false
KDE Plasma
Bell notification settings can be modified in System Settings > Accessibility Options > Bell.
Cinnamon
Cinnamon seems to play a "water drop" sound. To disable it, set in gsettings(1):
$ gsettings set org.cinnamon.desktop.wm.preferences audible-bell false
GTK
Append this line to ~/.gtkrc-2.0
:
gtk-error-bell = 0
Add the same line to the [Settings] section of $XDG_CONFIG_HOME/gtk-3.0/settings.ini
:
[Settings] gtk-error-bell = 0
This is documented in the Gnome Developer Handbook.
PulseAudio
Play a sound instead of a PC speaker beep using PulseAudio.
Arch Linux live ISO
You can patch the Arch Linux live ISO image (and other live images which play an init tune through GRUB) with the following command.
- The input and output file names have to be different or it will erase the image.
- While this has been tested on
archlinux-2023.12.01-x86_64.iso
and does not have any side effect on it, running this command might corrupt your image. Only run it if you can afford to download a new one in that case.
cat archlinux.iso | perl -pe 's/^play (([0-9]+ ?)+)/#lay \1/g' > archlinux-nobeep.iso
Beep
A user can create a short audible tone when logged in to a virtual console. See Wikipedia:Bell character#Usage for the details.
Beep is an advanced PC speaker beeping program. It is useful for situations where no sound card and/or speakers are available, and simple audio notification is desired.
Installation
You may also need to unmute the PC speaker in ALSA.
Run as non-root user
beep
uses /dev/input/by-path/platform-pcspkr-event-spkr
to control the PC speaker. To access it as a non-root user, one has to set the proper permissions. Create /etc/udev/rules.d/70-pcspkr-beep.rules
and add the following rule:
ACTION=="add", SUBSYSTEM=="input", ATTRS{name}=="PC Speaker", ENV{DEVNAME}!="", TAG+="uaccess"
That will allow any user, who is logged into the currently active virtual console session, to use the PC speaker.
Alternatively, a new user group may be created (e.g. beep
) with the corresponding rule to set the right permissions on the device file:
ACTION=="add", SUBSYSTEM=="input", ATTRS{name}=="PC Speaker", ENV{DEVNAME}!="", GROUP="beep", MODE="0620"
With that solution any user in the beep
group will be able to control the speaker.
To force reloading rules and device file to apply new user permission without a reboot, execute:
# udevadm control --reload && rmmod pcspkr && modprobe pcspkr
Tips and tricks
While many people are happy with the traditional beep sound, some may like to change its properties a bit. The following example plays slightly higher and shorter sound and repeats it two times.
# beep -f 5000 -l 50 -r 2
See also
- xset(1), setterm(1), bash(1)
- https://github.com/NaWer/beep and https://github.com/ShaneMcC/beeps - repositories collecting bash scripts playing various music using beep