Usplash
Encyclopedia
Usplash is a software project in the Ubuntu
community. Historically, scrolling text "verbose mode" has typically appeared on Linux computers during boot. Usplash replaces the scrolling-text screens with a graphical splash screen
. It was designed to replace Bootsplash
, which did the same thing on the kernel space
level. Since usplash operates in user space
, it can be updated without recompiling the kernel.
Usplash uses the Linux framebuffer
interface or, alternatively, direct VESA
access to display the splash screen.
In Ubuntu 9.10 "Karmic Koala", Usplash is only used in the preliminary stages of booting, after which XSplash
takes over. In Ubuntu 10.04 LTS "Lucid Lynx", Usplash has been fully replaced by Plymouth
.
Ubuntu (operating system)
Ubuntu is a computer operating system based on the Debian Linux distribution and distributed as free and open source software. It is named after the Southern African philosophy of Ubuntu...
community. Historically, scrolling text "verbose mode" has typically appeared on Linux computers during boot. Usplash replaces the scrolling-text screens with a graphical splash screen
Splash screen
A splash screen is an image that appears while a game or program is loading. It may also be used to describe an introduction page on a website. Splash screens sometimes do not cover the entire screen, but only a rectangle near the center...
. It was designed to replace Bootsplash
Bootsplash
Bootsplash is a term for a graphical representation of the boot process of the operating system.Bootsplash can be a simple visualisation of the scrolling boot messages in the console, but it can also present graphics or some combinations of both....
, which did the same thing on the kernel space
User space
A conventional computer operating system usually segregates virtual memory into kernel space and user space. Kernel space is strictly reserved for running the kernel, kernel extensions, and most device drivers...
level. Since usplash operates in user space
User space
A conventional computer operating system usually segregates virtual memory into kernel space and user space. Kernel space is strictly reserved for running the kernel, kernel extensions, and most device drivers...
, it can be updated without recompiling the kernel.
Usplash uses the Linux framebuffer
Linux framebuffer
The Linux framebuffer is a graphic hardware-independent abstraction layer to show graphics on a computer monitor, typically on the console...
interface or, alternatively, direct VESA
VESA
VESA is an international standards body for computer graphics founded in 1989 by NEC Home Electronics and eight other video display adapter manufacturers.VESA's initial goal was to produce a standard for 800×600 SVGA resolution video displays...
access to display the splash screen.
In Ubuntu 9.10 "Karmic Koala", Usplash is only used in the preliminary stages of booting, after which XSplash
XSplash
XSplash is a software project in the Ubuntu community that uses the X Window System to replace the scrolling-text screens that appear while booting a Linux-based computer with a graphical splash screen....
takes over. In Ubuntu 10.04 LTS "Lucid Lynx", Usplash has been fully replaced by Plymouth
Plymouth (software)
Plymouth is a bootsplash for Linux. It supports animations. It makes use of Direct Rendering Manager and kernel-based mode-setting . It gets packed into the initrd.Besides eye-candy, Plymouth also handles user interaction during boot....
.