/etc/laptop-mode/laptop-mode.conf

# Dell XPS 13 laptop-mode.conf
#   (EXPERIMENTAL)

ENABLE_LAPTOP_MODE_TOOLS=1

VERBOSE_OUTPUT=0
LOG_TO_SYSLOG=1
DEBUG=0

# 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

# Enable all simple zero-configuration auto modules
ENABLE_AUTO_MODULES=1

# 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

###
# Hard-disk
#

# Should laptop mode tools control readahead?
CONTROL_READAHEAD=0

# 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=0

# Should laptop mode tools control the hard drive power management settings?
# Set to 0 to disable
CONTROL_HD_POWERMGMT=0

# Should laptop mode tools control the hard drive write cache settings?
CONTROL_HD_WRITECACHE=0


###
# Advanced
#

# 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=0

# 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