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exwm_screen_layout
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#!/bin/bash
# https://wiki.archlinux.org/index.php/multihead
# The current version of exwm (0.23) uses only one X11 display. All X11 screens (what xrandr calls "output") are attached
# to that display, so X11 considers all screens to have the same Dots-Per-Inch (DPI).
# "xrandr --dpi" sets DPI for an X11 display, not for just a screen.
# "xrandr --fbmm" is also per display, not for just a screen.
# This implies that if we want a certain font size to have similar physical size on each screen, then we need to
# set the xrandr --mode on each screen to a similar physical DPI.
# I have two monitors, one that can achieve a physical DPI of up to 246 (call that HiDPI),
# and one that can achieve a physical DPI of up to 106.
# So in case I want say emacs default font to display similarly on both monitors, then I have to set a low resolution mode
# on the screen attached to the HiDPI monitor.
# X11 screens (xrandr graphics outputs) I want to use. Names and values are from the output of /usr/bin/xrandr
# They can be ordered in any way you want. The leftmost available screen will be primary, unless overridden
# by X11_SCREEN_PREFERRED and that screen is available.
# The primary screen is the default screen used for EXWM workspaces.
# It will also be sorted first in Xinerama and RANDR geometry requests.
export X11_SCREEN_LIST="eDP-1 DP-3"
# xrandr --mode for each screen in X11_SCREEN_LIST
export X11_SCREEN_MODE_LIST="1680x1050 3840x1600"
# xrandr --rate for each screen in X11_SCREEN_LIST
export X11_SCREEN_RATE_LIST="59.95 59.99"
# How screens are arranged from left to right. Vertical order, and "--same-as" not yet implemented.
export X11_SCREEN_ORDER_LIST="DP-3 eDP-1"
# X11 screens (graphics outputs) that should always be explicitly turned off, if available.
export X11_SCREEN_DISABLED_LIST="DP-2"
# Primary X11 screen, if available
export X11_SCREEN_PREFERRED="DP-3"
#export X11_SCREEN_PREFERRED="eDP-1"
# If X11_SCREEN_USE_ALL_AVAILABLE="yes" then use all available screens in X11_SCREEN_LIST:
# - X11_SCREEN_PREFERRED is primary, if available
# - If X11_SCREEN_PREFERRED is unavailable, primary is first available screen in X11_SCREEN_LIST.
# Otherwise use only one:
# - X11_SCREEN_PREFERRED if available
# - If X11_SCREEN_PREFERRED is unavailable then use first available screen in X11_SCREEN_LIST.
export X11_SCREEN_USE_ALL_AVAILABLE="yes"
#export X11_SCREEN_USE_ALL_AVAILABLE="no"
# Argument value for "xrandr --dpi", i.e. Dots Per Inch. This is for the X11 DISPLAY, i.e. used for all screens.
export X11_DISPLAY_DPI=106
# List of pairs "workspace-number screen"
# Used to construct exwm-randr-workspace-monitor-plist in emacs.
# If a screen in this list is unavailable, the workspace will be mapped to the primary screen.
export EXWM_WORKSPACE_LIST="1 eDP-1 3 eDP-1"
#export EXWM_WORKSPACE_LIST="1 DP-3 3 DP-3"