C[omp]ute

From: andrew cooke <andrew@...>

Date: Tue, 4 Mar 2014 22:00:37 -0300

- You can switch Fn and Ctrl in the BIOS
- You can enable virtualization in the BIOS

- For responsive screen brightness control you need to add
    acpi_backlight=vendor
  to boot opts 

- To get a comfortable set of buttons when using the pointer in
  /etc/X11/xorg.conf.d/50-synaptics.conf

  Section "InputClass"                                 
    Identifier "Default clickpad buttons"
    MatchDriver "synaptics"
    Option "SoftButtonAreas" "60% 0 0 10% 45% 60% 0 10%"
    Option "AreaTopEdge" "10%"
    Option "AreaLeftEdge" "0%"
    Option "AreaRightEdge" "100%"
  EndSection                                                                    
  and maybe

  Section "InputClass"
     Identifier "Trackpint speed"
     MatchProduct "TPPS/2 IBM TrackPoint"
     MatchDevicePath "/dev/input/event*"
     Option "AccelerationProfile" "2"
     Option "AdaptiveDeceleration" "2"
     Option "VelocityScale" "100"
  EndSection
 
- For better battery life in /etc/pm/power.d

  intel_audio.sh
  #!/bin/sh
  case $1 in
    true)
      # Running on battery
      echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller
       echo 1 > /sys/module/snd_hda_intel/parameters/power_save  
    ;;
    false)
      # Running on charger
      echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller
      echo 0 > /sys/module/snd_hda_intel/parameters/power_save  
    ;;
  esac
  exit 0

  nmi_watchdog.sh
  #!/bin/sh
  case $1 in
    true)
      # Running on battery
      # Disable the NMI watchdog
      echo 0 > /proc/sys/kernel/watchdog
    ;;
    false)
      # Running on charger
      # Enable the NMI watchdog
      echo 1 > /proc/sys/kernel/watchdog
    ;;
  esac
  exit 0

  sata_link.sh
  #!/bin/sh
  case $1 in
    true)
      # Running on battery
      echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
      echo min_power > /sys/class/scsi_host/host1/link_power_management_policy
      echo min_power > /sys/class/scsi_host/host2/link_power_management_policy
    ;;
    false)
      # Running on charger
      echo max_performance > /sys/class/scsi_host/host0/link_power_management_policy
      echo max_performance > /sys/class/scsi_host/host1/link_power_management_policy
      echo max_performance > /sys/class/scsi_host/host2/link_power_management_policy
    ;;
  esac
  exit 0

  usb_autosuspend.sh
  #!/bin/sh
  case $1 in
    true)
      # Running on battery
      for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 1 > $i; done 
      for i in /sys/bus/usb/devices/*/power/level; do echo auto > $i; done 
    ;;
    false)
      # Running on charger
      for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 0 > $i; done 
      for i in /sys/bus/usb/devices/*/power/level; do echo auto > $i; done 
    ;;
  esac
  exit 0

  vm_writeback.sh
  #!/bin/sh
  case "$1" in
      true)
         # Less VM disk activity. Suggested by powertop
         echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
      ;;
      false)
         #Return settings to default on AC power
         echo 500 > /proc/sys/vm/dirty_writeback_centisecs
      ;;
  esac

  and in /etc/pm/config.d/sata_alpm

  SATA_ALPM_ENABLE=true

Andrew