Differences

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--- laptop_hacks [2017/08/16 18:59] – [Power Disconnect/Connect events] admin
+++ laptop_hacks [2020/02/08 16:40] – [Power Disconnect/Connect events] admin
@@ Line 1: / Line 1: @@
 =====Laptop Hacks=====
-Ho boy, this got difficult really quickly - in 2012 I had everything working on my laptop with the LXDE spin of fedora plus fluxbox. After a quick spurt of travel using all the laptoppy things like conserving battery life, suspend/resume and lid up and down, I left it alone, using it like a desktop on AC power but updating through various fedora's. Quite unbeknownst to me, ''systemd'' came in and the laptoppy stuff got broken - I had to re-discover how to do everything again. Now I know and understand some of it and hopefully recording it here will help me next time.
+Ho boy, this got difficult really quickly - in 2011 I had everything working on my laptop (Dell XPS-15 L502X) with the LXDE spin of fedora plus fluxbox. After a quick spurt of travel using all the laptoppy things like conserving battery life, suspend/resume and lid up and down, I left it alone, using it like a desktop on AC power but updating through various fedora's. Quite unbeknownst to me, ''systemd'' came in and the laptoppy stuff got broken - I had to re-discover how to do everything again. Now I know and understand some of it and hopefully recording it here will help me next time.
 Maybe it'll help you too - but you will almost certainly need to some make tweaks for your particular setup.
-Why go through all this? Why not just use a full DE like KDE or gnome to take care of it? With KDE the best I could get (without digging just as deep as I have done here) was about 4 hours of battery life. By doing the hard work and understanding what's going on I can get up to 6.5 hours! Not bad.
+Why go through all this? Why not just use a full DE like KDE or gnome to take care of it? With KDE the best I could get was about 4 hours of battery life. By doing the hard work and understanding what's going on I can get up to 6.5 hours! Not bad.
 ====Who's doing the work?====
@@ Line 46: / Line 46: @@
 These events come through DBus, so I run this in my ''.xsession''.
-  # if there's a battery battery then listen on dbus for a/c connect/disconnect:
+  # if there's a battery then listen on dbus for a/c connect/disconnect:
-  upower -e |grep -q battery && power-monitor &
+  upower -e |grep -q battery && {
+      power-monitor &
+      xfce4-power-manager &
+  }
-Where, ''power-monitor'' is this bit of python which just runs the ''low-power'' script when the power/battery status changes:
+Where, ''power-monitor'' is this bit of python which keeps an eye on remaining battery life (and hibernate as it gets low) but also runs the ''low-power'' script when the power/battery status changes:
   #!/bin/env python
   # needs to run as normal user under X (so that battery-alarm can popup)
+  # requires dbus-python
   import gobject, os, sys
@@ Line 218: / Line 222: @@
   exit 0
+To run stuff on 'resume', put this in ''/etc/systemd/system/bhepple-resume.service'':
+  [Unit]
+  Description=Run on 'resume'
+  After=suspend.target
+  [Service]
+  User=root
+  Type=oneshot
+  ExecStart=/sbin/hdparm -y /dev/sda # puts aux disc into standby - should test that it's not '/' !!
+  [Install]
+  WantedBy=suspend.target
+and run ''systemctl enable bhepple-resume.service''
+brightness is this:
+  #!/bin/bash
+  # since xbacklight isn't working (nouveau?)
+  # https://bbs.archlinux.org/viewtopic.php?id=134972 and modified:
+  # needs to be run as root
+  NEW_VALUE=${1:-0}
+  # base dir for backlight class
+  basedir="/sys/class/backlight/"
+  # get the backlight handler
+  handler=$basedir$(ls $basedir |head -n 1)"/"
+  # get current brightness
+  old_brightness=$(cat $handler"brightness")
+  # get max brightness
+  max_brightness=$(cat $handler"max_brightness")
+  # get current brightness %
+  old_brightness_p=$(( 100 * $old_brightness / $max_brightness ))
+  # calculate new brightness %
+  if [[ $NEW_VALUE == [+-]* ]]; then
+      new_brightness_p=$(($old_brightness_p + $NEW_VALUE))
+  else
+      new_brightness_p=$NEW_VALUE
+  fi
+  # calculate new brightness value
+  new_brightness=$(( $max_brightness * $new_brightness_p / 100 ))
+  (( new_brightness <= max_brightness && new_brightness >= 0 )) && {
+      # set the new brightness value
+      echo $new_brightness > $handler"brightness"
+  }
 ====Disable nouveau====