Explicitly document and make it clear that those options do not change DPI of some monitor output. Also state that these options have no useful meaning for multi-monitor configuration.
Signed-off-by: Pali Rohár <pali.ro...@gmail.com> --- man/xrandr.man | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/man/xrandr.man b/man/xrandr.man index 65ccc2a..a5476d4 100644 --- a/man/xrandr.man +++ b/man/xrandr.man @@ -232,14 +232,20 @@ fit within this size. When this option is not provided, xrandr computes the smallest screen size that will hold the set of configured outputs; this option provides a way to override that behaviour. .IP "\-\-fbmm \fIwidth\fPx\fIheight\fP" -Sets the reported values for the physical size of the screen. Normally, +Sets the reported values for the physical size of the whole X screen (not particular +output!) which consists of all configured monitors. Physical size of the X screen does +not have any meaning when monitors with different DPI are configured. Normally, xrandr resets the reported physical size values to keep the DPI constant. -This overrides that computation. +This overrides that computation. This option should be calculated from DPI +value 96 as it not have any useful meaning for multi-monitor configuration. .IP "\-\-dpi \fIdpi\fP" .IP "\-\-dpi \fIfrom-output\fP" -This also sets the reported physical size values of the screen, it uses either +This also sets the reported physical size values of the whole X screen (not particular +output!) which consists of all configured monitors. Physical size of the X screen does not +have any meaning when monitors with different DPI are configured. This option uses either the specified DPI value, or the DPI of the given output, to compute an appropriate -physical size using whatever pixel size will be set. +physical size using whatever pixel size will be set (default 96 DPI). It does not +have any useful meaning for multi-monitor configuration. .IP "\-\-newmode \fIname\fP \fImode\fP" New modelines can be added to the server and then associated with outputs. This option does the former. The \fImode\fP is specified using the ModeLine -- 1.7.9.5 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
