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Linux framebuffer
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<p>The <a href="/facts/Framebuffer/kr8I4mm3">framebuffer</a> subsystem in the <a href="/facts/Linux_kernel/dlkduHuA">Linux kernel</a> fbdev is used to show <a href="/facts/Computer_graphics/lapBE8wv">graphics</a> on a <a href="/facts/Computer_monitor/NRaTDFHc">computer monitor</a>, typically on the <a href="/facts/System_console/FhWph34D">system console</a>. </p><p>It was designed as a hardware-independent <a href="/facts/API/GMlN4vUr">API</a> to give <a href="/facts/User_space_and_kernel_space/0yIzMY8t">user space</a> software access to the <a href="/facts/Framebuffer/kr8I4mm3">framebuffer</a> (the part of a computer's <a href="/facts/Video_random-access_memory/WNdr2E26">video memory</a> containing a current <a href="/facts/Film_frame/27Uqo8WN">video frame</a>) using only the <a href="/facts/Linux_kernel/dlkduHuA">Linux kernel</a>'s own basic facilities and its <a href="/facts/Device_file/t8ISnXft">device file</a> system interface, avoiding the need for libraries like <a href="/facts/SVGALib/mSXxl68G">SVGAlib</a> which effectively implemented video drivers in user space. </p><p>In most applications, fbdev has been superseded by the Linux <a href="/facts/Direct_Rendering_Manager/AjCBBvrU">Direct Rendering Manager</a> (DRM) subsystem, but as of 2022, several <a href="/facts/Device_driver/rDYnHU1G">drivers</a> provide both DRM and fbdev APIs for backwards compatibility with software that has not been updated to use the DRM system, and there are still fbdev drivers for older (mostly embedded) hardware that does not have a DRM driver. </p>