laptop-mode daemon segfaults + kernel error spam when on batery

[distro-setup] / laptop-xrandr

diff --git a/laptop-xrandr b/laptop-xrandr
index af21928b789f1ef4cd95089463966e4c7cc849a9..d57b43f1b6ec49f43d50a82e9a72036acb35ab54 100755 (executable)
--- a/laptop-xrandr
+++ b/laptop-xrandr
@@ -1,19 +1,100 @@
 #!/bin/bash
+# I, Ian Kelling, follow the GNU license recommendations at
+# https://www.gnu.org/licenses/license-recommendations.en.html. They
+# recommend that small programs, < 300 lines, be licensed under the
+# Apache License 2.0. This file contains or is part of one or more small
+# programs. If a small program grows beyond 300 lines, I plan to switch
+# its license to GPL.
+
+# Copyright 2024 Ian Kelling
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 set -e; . /usr/local/lib/bash-bear; set +e
 
+xf=$(mktemp)
+xrandr >$xf
 
-output=HDMI2
-output=DP1
+# eg eDP-1 connected primary
+laptop_out=$(awk '$3 == "primary" {print $1}' $xf)
+output=$(grep -E "^(HDMI|DP)[^ ]* connected [0-9]" $xf| awk '{print $1}' ||:)
 
-if xrandr | grep -q "^$output disconnected" &>/dev/null; then
-  xrandr --auto
-else
-  xrandr --output $output --off
-  sleep 2
-  xrandr --output $output --right-of eDP1 --mode 3840x2160
+edid() {
+  card=$1
+  sha256sum </sys/class/drm/$card/edid | grep -oE '^.{10}'
+}
+
+restart=false
+left_right_arg=--right-of
+if [[ $output ]]; then
+
+  mode=$(grep -A1 -E "^$output" $xf | tail -n1 | awk '{print $1}')
+
+  primary_res=$(awk '$2 == "connected" && $3 == "primary" { print $4 }' $xf | sed 's/+.*//')
+  primary_x=${primary_res%x*}
+
+  x=${mode%x*}
+  y=${mode#*x}
+
+  half_x=$(( x / 2 ))
+
+  x_offset=$primary_x
 
-  for i in 1 2 4 5 6 7 8 9 10; do
-    # if the workspace is already there, this will fail
+  # identify monitors that are always on the left.
+  if [[ $output == HDMI2 && $(edid card0-HDMI-A-2) == 192efbdcef ]] || \
+       [[ $output == HDMI-1 && $(edid card1-HDMI-A-1 ) == 7c58f9ac1e ]]; then
+    left_right_arg=--left-of
+    x_offset=0
+  fi
+
+  # some monitors need off then on to become active
+  if $restart; then
+    xrandr --output $output --off
+    sleep 2
+  fi
+
+
+  # eg: 3840x2160
+  echo mode=$mode
+  xrandr --output $output $left_right_arg $laptop_out --mode $mode
+
+
+  # This splits a monitor into 2 virtual screens, which makes it split
+  # into 2 workspaces in i3, which is a much more convenient setup for
+  # managing windows.
+  # todo: add an option to turn this off
+  # todo: do this on systems with just 1 monitor.
+  #
+  # /298 & 336 are millimeters. I took them from a monitor I was using. I
+  # don't know if they are important, I assume not important enough to
+  # change for different monitors.
+
+  for x in LEFT RIGHT; do
+    if xrandr --listmonitors | awk '$2 == BIG-'$x |grep . >/dev/null; then
+      xrandr --delmonitor BIG-$x
+    fi
+  done
+  xrandr --setmonitor BIG-LEFT $half_x/298x$y/336+0+$x_offset $output
+  xrandr --setmonitor BIG-RIGHT $half_x/298x$y/336+$(( x_offset + half_x ))+0 none
+
+
+  for i in 2 3 4 5 6 7 8 9 10; do
+    # if the workspace is already there, this will fail.
+    # if the workspace doesn't exist yet, it fails with:
+    # ERROR: No output matched
     i3-msg '[workspace="'$i'"]' move workspace to output $output ||:
   done
+else
+  xrandr --auto
+
 fi