16), those modes only are used to set up the display. This enables you
to select just the modes you want out of all of the valid modes.
At least one validated mode is required for the server to start up successfully. If multiple
modes pass the validation, they can be accessed through the RANDR extension
(Section 5.3); any modes that are listed in a Display subsection of a Screen section
can also be accessed through hotkeys (Section 5.2).
The level of log detail can be adjusted using the -logverbose level command-line
option, where level is a number from 0 to 9. The default is level 3; higher levels
introduce a bit more detail, notably the actual contents of the EDID decoded into
readable strings.
3.16 Configuring the Default Depth of a Screen
Many video drivers will default to an 8-bit color depth, but most video hardware
supports (and users want) a 24-bit depth.
The desired depth is specified in the Screen section of the configuration file:
DefaultDepth 24
You can override this by specifying a different value on the command line using the
-depth option.
The color depth affects the available visuals (Section 9.2). These are the most commonly
used depths:
4-bit
16 colors using a StaticColor visual.
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