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| | ===updated bash script for unpatched kernels=== | | ===updated bash script for unpatched kernels=== |
| | + | Moved to the [[ACPI fan control script|article page]], after joint development by [[User:Spiney|Spiney]] and [[User:Thinker|Thinker]]. |
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| − | Feedback welcome.
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| − |
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| − | (see below)
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| − |
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| − | BTW, Thinker, I couldn't get the backgrounding of a function to work, and at the moment I'm not quiet sure that's even possible without it exiting once the main script exits.
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| − |
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| − | If you think it's fine otherwise (after all your the author of the original script) we might put it into the article.
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| − |
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| − | --[[User:Spiney|spiney]] 19:01, 8 Nov 2005 (CET)
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| − | ----
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| − |
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| − | How about this? Used non-exec backgrounding, option to kill daemon, handling of initial (unknown) state and a few cleanups.
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| − |
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| − | <pre>
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| − | #!/bin/bash
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| − |
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| − | # This script dynamically controls fan speed on some ThinkPad models
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| − | # according to user-defined temperature thresholds. It implements its
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| − | # own decision algorithm, overriding the ThinkPad embedded
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| − | # controller. It also implements a workaround for the fan noise pulse
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| − | # experienced every few seconds on some ThinkPads.
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| − | #
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| − | # WARNING: This script relies on undocumented hardware features and
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| − | # overrides nominal hardware behavior. It may thus cause arbitrary
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| − | # damage to your laptop or data. Watch your temperatures!
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| − | #
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| − | # This file is placed in the public domain and may be freely distributed.
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| − |
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| − | LEVELS=( 0 2 4 7) # Fan speed levels
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| − | UP_TEMPS=( 52 60 68 ) # Speed increase trip points
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| − | DOWN_TEMPS=( 48 56 64 ) # Speed decrease trip points
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| − |
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| − | ANTIPULSE=( 0 1 0 0) # Prevent fan pulsing noise at this level
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| − | # (this also prevents fan speed updates)
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| − |
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| − | IBM_ACPI=/proc/acpi/ibm
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| − | PID_FILE=/var/run/tp-fancontrol.pid
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| − | INTERVAL=3
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| − | VERBOSE=true
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| − | DRY_RUN=false
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| − | DAEMONIZE=false
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| − | AM_DAEMON=false
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| − | KILL_DAEMON=false
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| − | SYSLOG=false
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| − | LOGGER=/usr/bin/logger
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| − |
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| − | usage() {
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| − | echo "Usage: $0 [OPTION]..."
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| − | echo
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| − | echo "Available options:"
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| − | echo " -t test mode"
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| − | echo " -q quiet mode"
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| − | echo " -d daemon mode, go into background (implies -q)"
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| − | echo " -l log to syslog"
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| − | echo " -p pid file location for daemon mode, default: $PID_FILE"
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| − | echo " -k kill daemon (ignores all but -p)"
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| − | exit 1
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| − | }
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| − |
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| − | while getopts 'qtdlp:kh' OPT; do
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| − | case "$OPT" in
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| − | t) # test mode
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| − | DRY_RUN=true
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| − | ;;
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| − | q) # quiet mode
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| − | VERBOSE=false
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| − | ;;
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| − | d) # go into background and daemonize
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| − | DAEMONIZE=true
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| − | ;;
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| − | l) # log to syslog
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| − | SYSLOG=true
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| − | ;;
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| − | p) # different pidfile
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| − | PID_FILE="$OPTARG"
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| − | ;;
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| − | k) # kill daemon
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| − | KILL_DAEMON=true
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| − | ;;
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| − | h) # short help
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| − | usage
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| − | ;;
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| − | \?) # error
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| − | usage
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| − | ;;
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| − | esac
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| − | done
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| − | [[ $OPTIND -gt $# ]] || usage # no non-option args
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| − |
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| − | # no logger found, no syslog capabilities
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| − | $SYSLOG && [[ ! -x $LOGGER ]] && SYSLOG=false
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| − |
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| − | if $DRY_RUN; then
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| − | echo "$0: Dry run, will not change fan state."
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| − | VERBOSE=true
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| − | DAEMONIZE=false
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| − | fi
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| − |
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| − | thermometer() { # output list of temperatures
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| − | read X Y < $IBM_ACPI/thermal
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| − | if ! [[ "$X" == "temperatures:" ]]; then
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| − | echo "$0: Bad temperatures: $X $Y" >&2
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| − | exit 1
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| − | fi
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| − | echo "$Y";
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| − | }
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| − |
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| − | speedometer() { # output fan speed RPM
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| − | sed -n 's/^speed:[ \t]*//p' $IBM_ACPI/fan
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| − | }
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| − |
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| − | setlevel() { # set fan speed level
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| − | $DRY_RUN || echo 0x2F $1 > $IBM_ACPI/ecdump
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| − | }
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| − |
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| − | cleanup() { # clean up after work
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| − | $AM_DAEMON && rm -f $PID_FILE 2> /dev/null
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| − | $SYSLOG && $LOGGER -t "`basename $0`[$$]" \
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| − | "Shutting down, switching to automatic fan control"
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| − | $DRY_RUN || echo enable > $IBM_ACPI/fan
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| − | }
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| − |
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| − | control_fan() {
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| − | # Enable the fan in default mode if anything goes wrong:
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| − | set -e -E -u
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| − | trap "cleanup; exit 2" HUP INT ABRT QUIT SEGV TERM
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| − | trap "cleanup" EXIT
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| − |
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| − | IDX=0
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| − | MAX_IDX=$(( ${#LEVELS[@]} - 1 ))
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| − | SETTLE=0
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| − | FIRST=true
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| − | $SYSLOG && $LOGGER -t "`basename $0`[$$]" "Starting dynamic fan control"
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| − |
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| − | # Control loop:
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| − | while true; do
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| − | TEMPS=`thermometer`
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| − | $VERBOSE && SPEED=`speedometer`
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| − |
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| − | # Calculate new level
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| − | NEWIDX=$IDX
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| − | DOWN=$(( IDX > 0 ))
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| − | for TEMP in $TEMPS; do
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| − | # Increase speed as much as needed
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| − | while [[ $NEWIDX -lt $MAX_IDX ]] &&
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| − | [[ $TEMP -ge ${UP_TEMPS[$NEWIDX]} ]]; do
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| − | (( NEWIDX ++ ))
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| − | DOWN=0
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| − | done
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| − | # Allow decrease (by one index)?
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| − | if [[ $DOWN == 1 ]] &&
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| − | [[ $TEMP -gt ${DOWN_TEMPS[$(( IDX - 1 ))]} ]]; then
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| − | DOWN=0
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| − | fi
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| − | done
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| − | if [[ $DOWN == 1 ]]; then
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| − | NEWIDX=$(( IDX - 1 ))
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| − | fi
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| − |
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| − | # Transition
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| − | $FIRST && OLDLEVEL=unknown || OLDLEVEL=${LEVELS[$IDX]}
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| − | NEWLEVEL=${LEVELS[$NEWIDX]}
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| − | $VERBOSE && echo "Temps: $TEMPS Fan: $SPEED Level: $OLDLEVEL->$NEWLEVEL"
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| − | $SYSLOG && [[ $OLDLEVEL != $NEWLEVEL ]] &&
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| − | $LOGGER -t "`basename $0`[$$]" "Changing fan level: $OLDLEVEL->$NEWLEVEL"
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| − |
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| − | setlevel $NEWLEVEL
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| − |
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| − | sleep $INTERVAL
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| − |
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| − | # If needed, apply anti-pulsing hack after a settle-down period:
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| − | if [[ ${ANTIPULSE[${NEWIDX}]} == 1 ]]; then
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| − | if [[ $NEWLEVEL == $OLDLEVEL ]]; then
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| − | if [[ $SETTLE -ge 0 ]]; then
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| − | (( SETTLE -= INTERVAL ))
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| − | else
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| − | setlevel 0x40 # disengaged
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| − | sleep 0.5
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| − | fi
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| − | else
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| − | SETTLE=6
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| − | fi
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| − | fi
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| − |
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| − | IDX=$NEWIDX
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| − | FIRST=false
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| − | done
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| − | }
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| − |
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| − | if $KILL_DAEMON ; then
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| − | if [ -f $PID_FILE ]; then
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| − | set -e
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| − | DPID="`cat $PID_FILE`"
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| − | kill "$DPID"
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| − | rm "$PID_FILE"
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| − | $VERBOSE && echo "Killed process $DPID"
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| − | else
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| − | $VERBOSE && echo "Daemon not running."
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| − | exit 1
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| − | fi
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| − | elif $DAEMONIZE ; then
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| − | if [ -e "$PID_FILE" ]; then
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| − | echo "$0: File $PID_FILE already exists, refusing to run."
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| − | exit 1
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| − | else
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| − | AM_DAEMON=true VERBOSE=false control_fan 0<&- 1>&- 2>&- &
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| − | echo $! > "$PID_FILE"
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| − | exit 0
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| − | fi
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| − | else
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| − | control_fan
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| − | fi
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| − | </pre>
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| − |
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| − | --[[User:Thinker|Thinker]] 20:28, 8 Nov 2005 (CET)
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| − | ----
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| − |
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| − | Great work, thanks. Just added startup and shutdown messages and made some echos depending on $VERBOSE so you can for instance call <tt>script -qk</tt> from an init-script without problems. Also set the exit value to non-zero when trying to kill a not running daemon.
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| − |
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| − | Oh, and I incorporated you last minor edit, because that ended up in the version that I put into my last comment. ;)
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| − |
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| − | --[[User:Spiney|spiney]] 22:18, 8 Nov 2005 (CET)
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| − | ----
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| − |
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| − | Yes, good ideas. The current version works perfectly for me. If you're happy with it, let's move it to the article page (and let's make it the first one in that section, in order not to frighten people away with the need for the patch).
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| − |
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| − | BTW, someone should add "Wait for winter" to the list of fan noise partial solutions. Those few degrees in ambient temperature make a big difference here, with the current thresholds...
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| − |
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| − | --[[User:Thinker|Thinker]] 01:03, 9 Nov 2005 (CET)
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| | ---- | | ---- |
Wyrfel, are you sure the recent (19:54, 27 Oct 2005) cosmetic change was a good idea? The extensive chunks of code make it hard to grok the structure of the article in the absense of separator lines (which "===" doesn't have). --Thinker 22:10, 27 Oct 2005 (CEST)
We can discuss this. From my point of view, the chunks of code distinguish themselves from each other quite well, because they are each in one code block.
I do not like the = section level - and so far we avoided them on all pages - because
- it generates H1 headings, which is the same as the page heading,
- having more than one level with the hbars is confusing/less readable, because they are not very well distinguishable. This way i.e. the "Other" section looked like a separate empty secion.
I think the way it's now, the separator lines make it possible to easily distinguish the different main sections, while when you have both levels with separator lines, an additional task of distinguishing H1 and H2 separators is necessary.
However, i see your point as well and would like to hear more opinions/arguments.
Wyrfel 22:31, 27 Oct 2005 (CEST)
bash script with fine control over fan speed (for unpatched kernels)
Here's an alternative variable speed control script that doesn't need the patch for controlling fan speed. It requires only ibm-acpi 0.11 or higher (e.g., as found in kernel 2.6.14 and higher) with the experimental=1 module parameter.
Alas, at the moment I don't have a suitable to test it on. Can someone give it a try and report?
(fixed and moved to article)
--Thinker 15:07, 3 Nov 2005 (CET)
IBM_ACPI was defined twice by accident I guess (changed above), but otherwise it seems to work fine, went from level 0 (cold machine) to 7 while compiling the kernel and now back to level 2 now at about 53 degrees Celsius.
--spiney 10:31, 5 Nov 2005 (CET)
Oops, yes. The IBM_ACPI=/tmp was just for testing (in the temporary absense of a ThinkPad, I wrote stuff to /tmp/thermal manually to test the script...). Fixed and moved to the article. Thanks!
--Thinker 12:58, 5 Nov 2005 (CET)
updated bash script for unpatched kernels
Moved to the article page, after joint development by Spiney and Thinker.
