[laptop-mode] laptop-mode does not start properly
Bart Samwel
bart at samwel.tk
Fri Jul 31 17:04:05 CEST 2009
Hi Tomas,
This is a known issue in versions 1.49 and before, which is supposed
to have been fixed in 1.50. It's caused by the laptop mode polling
daemon, which is not properly backgrounded and then hangs the startup
process. Are you running a version 1.49 or earlier? In that case, the
advice would be to upgrade.
Cheers,
Bart
On Fri, Jul 31, 2009 at 16:46, Tomas Davidek<Tomas.Davidek at cern.ch> wrote:
> Hello,
> I am having troubles with laptop-mode-tools. When turning on my
> laptop that is not powered, the system hangs on starting the
> laptop-mode. So I had to remove the startup link from /etc/rc2.d and try
> to start it manually.
>
> Before I did that, I checked that /var/run/laptop-mode-tools is empty (no
> file "enabled" is present).
>
> So, after starting that manually, the program sort of hangs on the messages:
> ----------
>
> Invoking module /usr/share/laptop-mode-tools/modules/wireless-ipw-power.
> Intel IPW Wireless power setting is disabled.
> Invoking module /usr/share/laptop-mode-tools/modules/wireless-iwl-power.
> Intel IWL Wireless power setting is disabled.
> Module /usr/local/lib/laptop-mode-tools/modules/* is not executable.
> Module /usr/local/share/laptop-mode-tools/modules/* is not executable.
> Module /etc/laptop-mode/modules/* is not executable.
> -----------
> At this stage, I realized that the following processes are running:
> 3911 pts/0 S+ 0:00 /bin/sh /etc/init.d/laptop-mode start
> 3973 pts/0 S+ 0:00 /bin/sh
> /usr/share/laptop-mode-tools/module-helpers/l
> 3980 pts/0 S+ 0:00 sleep 150
>
> So laptop-mode is apparently waiting for something? After a while (likely
> 150 sec), program continues and issues these messages:
> -------
> Determining power state from /sys/class/power_supply/AC/online.
> Not trying other options, already found a power supply.
> On battery power: Activating, because ENABLE_LAPTOP_MODE_ON_BATTERY is set.
> Not on AC and we have battery information in /sys/class/power_supply/BAT* --
> checking minimum battery charge.
> /sys/class/power_supply/AC is of type Mains.
> Not of type "Battery", skipping.
> /sys/class/power_supply/BAT0 is of type Battery.
> Checking levels for /sys/class/power_supply/BAT0.
> Present: 1.
> Remaining charge: 3817000
> Full capacity: 5200000
> Checking if desired state is different from current state.
> ------------------------
> This is repeated every 150 sec. Well, is sounds like it works, but in fact I
> never get a prompt, i.e. the startup never finished. Is that a feature, bug
> or some wrong settings ? My /etc/laptop-mode/laptop-mode.conf is attached.
>
> Thanks a lot for any hint, best regards
> Tomas
>
> P.S: Another question: since laptop-mode can deal with CPU frequency
> scaling, one probably does not need cpufreqd (standalone daemon that does
> similar job). Does someone have any experience which of the two ways are
> better/suitable for certain cases ?
>
> ###############################################################################
> #
> # Configuration for Laptop Mode Tools
> # -----------------------------------
> #
> # There is a "system" to the configuration setting names:
> # CONTROL_something=0/1 Determines whether Laptop Mode Tools controls
> # something
> # LM_something=value Value of "something" when laptop mode is active
> # NOLM_something=value Value of "something" when laptop mode is NOT
> # active
> # AC_something=value Value of "something" when the computer is
> running
> # on AC power
> # BATT_something=value Value of "something when the computer is
> running
> # on battery power
> #
> # There can be combinations of LM_/NOLM_ and AC_/BATT_ prefixes, but the
> # available prefixes are different for each setting. The available ones are
> # documented in the manual page, laptop-mode.conf(8). If there is no LM_/
> # NOLM_ in a setting name, then the value is used independently of laptop
> # mode state, and similarly, if there is no AC_/BATT_, then the value is
> used
> # independently of power state.
> #
> # Some options only work on ACPI systems. They are marked ACPI-ONLY.
> #
> # Note that this configuration file is a fragment of shell script: you
> # can use all the features of the shell scripting language to achieve your
> # desired configuration.
> #
> #
> # Modules
> # -------
> #
> # Laptop Mode Tools modules have separate configuration files, that can be
> # found in /etc/laptop-mode/conf.d. Please look through these configuration
> # files as well, there are many useful power saving tools in there!
> #
> ###############################################################################
>
>
>
> ###############################################################################
> # Configuration debugging
> # -----------------------
> ###############################################################################
>
>
> #
> # Set this to 1 if you want to see a lot of information when you start/stop
> # laptop_mode.
> #
> VERBOSE_OUTPUT=1
>
> # Set this to 1 if you want to log messages to syslog
> LOG_TO_SYSLOG=1
>
>
>
> ###############################################################################
> # When to enable laptop mode
> # --------------------------
> #
> # "Laptop mode" is the mode in which laptop mode tools makes the computer
> # consume less power. This includes the kernel "laptop_mode" feature, which
> # allows your hard drives to spin down, as well as various other settings
> which
> # can be tweaked by laptop mode tools. You can enable or disable all of
> these
> # settings using the CONTROL_... options further down in this config file.
> ###############################################################################
>
>
> #
> # Enable laptop mode when on battery power.
> #
> ENABLE_LAPTOP_MODE_ON_BATTERY=1
>
>
> #
> # Enable laptop mode when on AC power.
> #
> ENABLE_LAPTOP_MODE_ON_AC=0
>
>
> #
> # Enable laptop mode when the laptop's lid is closed, even when we're on AC
> # power? (ACPI-ONLY)
> #
> ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED=0
>
>
>
> ###############################################################################
> # When to enable data loss sensitive features
> # -------------------------------------------
> #
> # When data loss sensitive features are disabled, laptop mode tools acts as
> if
> # laptop mode were disabled, for those features only.
> #
> # Data loss sensitive features include:
> # - laptop_mode (i.e., delayed writes)
> # - hard drive write cache
> #
> # All of the options that follow can be set to 0 in order to prevent laptop
> # mode tools from using them to stop data loss sensitive features. Use this
> # when you have a battery that reports the wrong information, that confuses
> # laptop mode tools.
> #
> # Disabling data loss sensitive features is ACPI-ONLY, and it only works if
> # your battery gives off frequent ACPI events to indicate a change in
> battery
> # level.
> #
> # NOTE: If your battery does NOT give off battery events often enough, you
> can
> # enable the battery-level-polling module to make this work. Look at the
> # file /etc/laptop-mode/conf.d/battery-level-polling.conf for more
> information.
> #
> ###############################################################################
>
>
> #
> # Disable all data loss sensitive features when the battery level (in % of
> the
> # battery capacity) reaches this value.
> #
> MINIMUM_BATTERY_CHARGE_PERCENT=3
>
>
> #
> # Disable data loss sensitive features when the battery reports its state
> # as "critical".
> #
> DISABLE_LAPTOP_MODE_ON_CRITICAL_BATTERY_LEVEL=1
>
>
>
> ###############################################################################
> # Controlled hard drives and partitions
> # -------------------------------------
> #
> # For spinning down your hard drives, laptop mode will remount file systems
> and
> # adjust hard drive spindown timeouts. These parameters specify which
> # devices and partitions are affected by laptop mode.
> ###############################################################################
>
>
> #
> # The drives that laptop mode controls.
> # Separate them by a space, e.g. HD="/dev/hda /dev/hdb". The default is a
> # wildcard, which will get you all your IDE and SCSI/SATA drives.
> #
> #HD="/dev/[hs]d[abcdefgh]"
> # TD:
> HD="/dev/sda"
>
>
> #
> # The partitions (or mount points) that laptop mode controls.
> # Separate the values by spaces. Use "auto" to indicate all partitions on
> drives
> # listed in HD. You can add things to "auto", e.g. "auto /dev/hdc3". You can
> # also specify mount points, e.g. "/mnt/data".
> #
> PARTITIONS="auto /dev/mapper/*"
>
>
> #
> # If this is enabled, laptop mode tools will assume that SCSI drives are
> # really SATA drives that only _look_ like SCSI drives, and will use hdparm
> # to control them. Set this to 0 if you have /dev/sd devices and you want
> # laptop mode tools to use the "sdparm" command to control them.
> #
> ASSUME_SCSI_IS_SATA=1
>
>
> ###############################################################################
> # Hard drive behaviour settings
> # -----------------------------
> #
> # These settings specify how laptop mode tools will adjust the various
> # parameters of your hard drives and file systems.
> ###############################################################################
>
>
> #
> # Maximum time, in seconds, of work that you are prepared to lose when your
> # system crashes or power runs out. This is the maximum time that Laptop
> Mode
> # will keep unsaved data waiting in memory before spinning up your hard
> drive.
> #
> LM_BATT_MAX_LOST_WORK_SECONDS=600
> LM_AC_MAX_LOST_WORK_SECONDS=360
>
>
> #
> # Should laptop mode tools control readahead?
> #
> CONTROL_READAHEAD=1
>
>
> #
> # Read-ahead, in kilobytes. You can spin down the disk while playing MP3/OGG
> # by setting the disk readahead to a reasonable size, e.g. 3072 (3 MB).
> # Effectively, the disk will read a complete MP3 at once, and will then spin
> # down while the MP3/OGG is playing. Don't set this too high, because the
> # readahead is applied to _all_ files that are read from disk.
> #
> LM_READAHEAD=3072
> NOLM_READAHEAD=128
>
>
> #
> # Should laptop mode tools add the "noatime" option to the mount options
> when
> # laptop mode is enabled?
> #
> CONTROL_NOATIME=0
>
> # Should laptop use relatime instead of noatime? The "relatime" mount option
> has
> # more standards-compliant semantics, and allows more applications to work,
> # while retaining a low level of atime updates (i.e., disk writes).
> USE_RELATIME=1
>
>
> #
> # Should laptop mode tools control the hard drive idle timeout settings?
> #
> CONTROL_HD_IDLE_TIMEOUT=1
>
>
> #
> # Idle timeout values. (hdparm -S)
> # Default is 2 hours on AC (NOLM_HD_IDLE_TIMEOUT_SECONDS=7200) and 20
> seconds
> # for battery and for AC with laptop mode on.
> #
> LM_AC_HD_IDLE_TIMEOUT_SECONDS=20
> LM_BATT_HD_IDLE_TIMEOUT_SECONDS=20
> NOLM_HD_IDLE_TIMEOUT_SECONDS=7200
>
>
> #
> # Should laptop mode tools control the hard drive power management settings?
> #
> CONTROL_HD_POWERMGMT=0
>
>
> #
> # Power management for HD (hdparm -B values)
> #
> BATT_HD_POWERMGMT=1
> LM_AC_HD_POWERMGMT=254
> NOLM_AC_HD_POWERMGMT=254
>
>
> #
> # Should laptop mode tools control the hard drive write cache settings?
> #
> CONTROL_HD_WRITECACHE=0
>
>
> #
> # Write cache settings for HD (hdparm -W values)
> #
> NOLM_AC_HD_WRITECACHE=1
> NOLM_BATT_HD_WRITECACHE=0
> LM_HD_WRITECACHE=0
>
>
>
>
> ###############################################################################
> # Settings you probably don't want to touch
> # -----------------------------------------
> #
> # It is usually not necessary to change these parameters. They are included
> # for completeness' sake.
> ###############################################################################
>
>
> #
> # Change mount options on partitions in PARTITIONS? You don't really want to
> # disable this. If you do, then your hard drives will probably not spin down
> # anymore.
> #
> CONTROL_MOUNT_OPTIONS=1
>
>
> #
> # Dirty synchronous ratio. At this percentage of dirty pages the process
> # which calls write() does its own writeback.
> #
> LM_DIRTY_RATIO=60
> NOLM_DIRTY_RATIO=40
>
>
> #
> # Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
> # exceeded, the kernel will wake pdflush which will then reduce the amount
> # of dirty memory to dirty_background_ratio. Set this nice and low, so once
> # some writeout has commenced, we do a lot of it.
> #
> LM_DIRTY_BACKGROUND_RATIO=1
> NOLM_DIRTY_BACKGROUND_RATIO=10
>
>
> #
> # kernel default settings -- don't touch these unless you know what you're
> # doing.
> #
> DEF_UPDATE=5
> DEF_XFS_AGE_BUFFER=15
> DEF_XFS_SYNC_INTERVAL=30
> DEF_XFS_BUFD_INTERVAL=1
> DEF_MAX_AGE=30
>
>
> #
> # This must be adjusted manually to the value of HZ in the running kernel
> # on 2.4, until the XFS people change their 2.4 external interfaces to work
> in
> # centisecs. This can be automated, but it's a work in progress that still
> # needs some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for
> # external interfaces, and that is currently always set to 100. So you don't
> # need to change this on 2.6.
> #
> XFS_HZ=100
>
>
> #
> # Seconds laptop mode has to to wait after the disk goes idle before doing
> # a sync.
> #
> LM_SECONDS_BEFORE_SYNC=2
>
>
>
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