iankelling.org Git - distro-setup/blob - laptop-xrandr

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23 set -e; . /usr/local/lib/bash-bear; set +e
  24
  25 # eg eDP-1 connected primary
  26 laptop_out=$(xrandr | awk '$3 == "primary" {print $1}')
  27 output=$(xrandr | grep -E "^(HDMI|DP)[^ ]* connected [0-9]" | awk '{print $1}' ||:)
  28
  29 left_right_arg=--right-of
  30 if [[ $output ]]; then
  31
  32   # identify monitors that are always on the left.
  33   if [[ $output == HDMI2 && $(sha256sum </sys/class/drm/card0-HDMI-A-2/edid | grep -oE '^.{10}') == 192efbdcef ]]; then
  34     left_right_arg=--left-of
  35   fi
  36   if [[ $output == HDMI-1 && $(sha256sum </sys/class/drm/card1-HDMI-A-1/edid | grep -oE '^.{10}') == 7c58f9ac1e ]]; then
  37     left_right_arg=--left-of
  38   fi
  39
  40   xrandr --output $output --off
  41   sleep 2
  42   mode=$(xrandr | grep -A1 -E "^$output" | tail -n1 | awk '{print $1}')
  43   # eg: 3840x2160
  44   echo mode=$mode
  45   xrandr --output $output $left_right_arg $laptop_out --mode $mode
  46
  47   for i in 1 2 4 5 6 7 8 9 10; do
  48     # if the workspace is already there, this will fail.
  49     # if the workspace doesn't exist yet, it fails with:
  50     # ERROR: No output matched
  51     i3-msg '[workspace="'$i'"]' move workspace to output $output ||:
  52   done
  53 else
  54   xrandr --auto
  55
  56 fi