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# Plymouth

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From ArchWiki

Related articles

- Silent boot

Plymouth is a project from Fedora and now listed among the freedesktop.org's official resources providing a flicker-free graphical boot process. It relies on kernel mode setting (KMS) to set the native resolution of the display as early as possible, then provides an eye-candy splash screen leading all the way up to the login manager.

## Preparation

Plymouth primarily uses KMS to display graphics, but on UEFI systems it can utilize the EFI framebuffer.

If you cannot use KMS, e.g. because you are using a proprietary driver, or if you do not want to use the EFI framebuffer, consider using Uvesafb as it works with widescreen resolutions. If you have neither KMS nor a framebuffer, Plymouth will fall back to text-mode.

## Installation

Plymouth is available with the stable package plymouth. For the development version, use plymouth-gitAUR.

By default, Plymouth logs the boot messages into `/var/log/boot.log`, and does not show the graphical splash screen.

- If you want to see the splash screen, append `splash` to the kernel parameters.
- If you want silent boot, append `quiet` too.
- If you want to disable the logging, append `plymouth.boot-log=/dev/null`. Alternatively, add `plymouth.nolog` which also disables console redirection.

To start Plymouth on early boot, you must configure your initramfs generator to create images including Plymouth.

### mkinitcpio

Add `plymouth` to the `HOOKS` array in mkinitcpio.conf.

    /etc/mkinitcpio.conf

    HOOKS=(... plymouth ...)

If you are using the `systemd` hook, it must be before `plymouth`.

Furthermore make sure you place `plymouth` before the `encrypt` or `sd-encrypt` hook if your system is encrypted with dm-crypt.

Finally, regenerate the initramfs.

### dracut

After installing Plymouth, dracut will automatically detect it and add it to your initramfs images. If autodetection fails, you can force dracut to include Plymouth by adding the following line to your dracut configuration:

    /etc/dracut.conf.d/myflags.conf

    add_dracutmodules+=" plymouth "

## Configuration

Plymouth can be configured in file `/etc/plymouth/plymouthd.conf`. You can see the default values in `/usr/share/plymouth/plymouthd.defaults`.

### Changing the theme

Plymouth comes with a selection of themes:

1. BGRT: A variation of Spinner that keeps the OEM logo if available (BGRT stands for Boot Graphics Resource Table)
2. Fade-in: "Simple theme that fades in and out with shimmering stars"
3. Glow: "Corporate theme with pie chart boot progress followed by a glowing emerging logo"
4. Script: "Script example plugin" (Despite the description seems to be a quite nice Arch logo theme)
5. Solar: "Space theme with violent flaring blue star"
6. Spinner: "Simple theme with a loading spinner"
7. Spinfinity: "Simple theme that shows a rotating infinity sign in the center of the screen"
8. Tribar: "Text mode theme with tricolor progress bar"
9. Text: "Text mode theme with tricolor progress bar"
10. Details: "Verbose fallback theme"

Arch sets the default theme to bgrt[1]. This can be confirmed by running:

    $ plymouth-set-default-theme

The theme can be changed by editing the configuration file:

    /etc/plymouth/plymouthd.conf

    [Daemon]
    Theme=theme

or by running:

    # plymouth-set-default-theme -R theme

Every time a theme is changed, the `initrd` must be rebuilt. The `-R` option ensures that it is rebuilt (otherwise regenerate the initramfs manually).

### Install new themes

You can install other themes from AUR. [2], alternatively plymouth-kcm provides integration into KDE Plasma's settings and offers themes not available on the AUR.

All currently installed themes can be listed by using this command:

    $ plymouth-set-default-theme -l

or:

    $ ls /usr/share/plymouth/themes

    bgrt  details  fade-in  glow  script  solar  spinfinity  spinner  text  tribar

### Show delay

Plymouth has a configuration option to delay the splash screen:

    /etc/plymouth/plymouthd.conf

    [Daemon]
    ShowDelay=5

On systems that boot quickly, you may only see a flicker of your splash theme before your DM or login prompt is ready. You can set `ShowDelay` to an interval (in seconds) longer than your boot time to prevent this flicker and only show a blank screen. The default is 0 seconds, so you should not need to change this to a different value to see your splash earlier during boot.

### HiDPI

Edit the configuration file:

    /etc/plymouth/plymouthd.conf

    [Daemon]
    DeviceScale=an-integer-scaling-factor

and regenerate the initramfs.

## Tips and tricks

### Show boot messages

During boot you can switch to boot messages by pressing the `Esc` key.

### Smooth transition

GDM supports smooth transition out of the box.

### Preview themes

The currently configured theme can be previewed by running[3]:

    # plymouthd; plymouth --show-splash; sleep 5; plymouth --quit

Note: The execution as a chained command including a `sleep` invocation allows to return control to the user after the defined delay; do not remove it.

### Change background image

You can add a background image for two-step-based themes (such as spinner and bgrt). Just place your desired image into `/usr/share/plymouth/themes/spinner/background-tile.png`. Do not forget to regenerate the initrd once the theme changed.

### Missing BGRT image

In case you are using the BGRT theme but the UEFI does not provide a vendor logo, you can place a fallback image into `/usr/share/plymouth/themes/spinner/bgrt-fallback.png` to show it instead.

Alternatively, set the following to keep the firmware background:

    /etc/plymouth/plymouthd.conf

    UseFirmwareBackground=true

### Slow down boot to show the full animation

On systems with a very fast boot time, it might be necessary to add a delay to `plymouth-quit.service` with a drop-in snippet containing `ExecStartPre=/usr/bin/sleep 5` if showing the whole animation is desired. See this reddit post.

Alternatively, it is possible to use a new systemd service starting at the same time as plymouth and waiting the whole duration needed for the animation. This method will ensure that inconsistencies in the boot time will not be perceived, as it is not time added after the animation but a delay running during the animation.

    /etc/systemd/system/plymouth-wait-for-animation.service

    [Unit]
    Description=Waits for Plymouth animation to finish
    Before=plymouth-quit.service display-manager.service

    [Service]
    Type=oneshot
    ExecStart=/usr/bin/sleep duration_of_your_animation

    [Install]
    WantedBy=plymouth-start.service

Then enable the service.

Note: None of the previous methods will work if you are starting Plymouth from initramfs.

### Using SimpleDRM

On devices using UEFI, Plymouth is able to use the SimpleDRM driver to display the boot splash on the UEFI framebuffer. This allows the boot splash to appear on faster machines where loading the GPU driver takes too long (for example, systems with AMD GPUs), and also removes any flicker between the motherboard splash screen and Plymouth.

Warning: When using this method, secondary monitors will not turn on during the boot process. If you use a docked laptop, the password prompt for full disk encryption may not be visible.

To enable SimpleDRM, append `plymouth.use-simpledrm` to your kernel parameters. See Plymouth issue 264 for more information about this option.

## Troubleshooting

### Disable with kernel parameters

If you experience problems during boot, you can temporary disable Plymouth with the following kernel parameters:

    plymouth.enable=0 disablehooks=plymouth

### Debugging

To write debug output into `/var/log/plymouth-debug.log`, add the following kernel parameter:

    plymouth.debug

### Password prompt does not update

When using `systemd` instead of `udev` hooks in Mkinitcpio, the password prompt may not update on themes that handle it via Plymouth scripting.

You can try switching to development version plymouth-gitAUR or using substitutes from Mkinitcpio#Common hooks.

### Display is not centered

Certain themes may have trouble centering the display when there is more than one monitor enabled during boot.

You can use Kernel mode setting#Forcing modes to disable specific monitors.

## See also

- Original specification
- Related forum thread
- Gentoo:Plymouth/Theme creation

Category:

- Bootsplash