Mode setting
software operation that activates a display mode for a computer's display controller
Mode setting is a software operation that activates a display mode (screen resolution, color depth, and refresh rate) for a computer's display controller by using VESA BIOS Extensions or UEFI Graphics extensions (on more modern computers).
The display mode is set by the kernel. In user-space mode-setting (UMS), the display mode is set by a user-space process.
Kernel mode-setting is more flexible and allows displaying of an error in the case of a fatal system error in the kernel, even when using a user-space display server.
User-space mode setting would require superuser privileges for direct hardware access, so kernel-based mode setting shuns such requirement for the user-space graphics server.
On the hardware side, the GPU consists of multiple components, among which are render engine, i.e. the component of the GPU responsible for executing OpenGL/Vulkan commands, and the display engine, i.e. the component of the GPU responsible for sending a "video stream" to the screen, as opposed to the part performing rendering.
To improve performance, many GPUs come with a feature called hardware planes. Planes can make the display engine perform the composition.
Begin with the source’s own compact description: “Mode setting” is software operation that activates a display mode for a computer's display controller. The dossier treats that line as a proposition to test through Mode, setting and software, not as a finished interpretation.
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The phrase “software operation that activates a display mode for a computer's display controller” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Nov 25, 2025. The linked authority identifier is Q1550143. None of the 0 selected statements returned an explicit reference.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Mode setting” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.