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This post describes how I approach WMI debugging based on the DSDT from your acpidump (SSDT does not contain relevant details here). \_SB.AMW0 is the WMI device in your Dell ACPI firmware. The \EV4 method calls \WMNF which is the only method that calls on the \_SB.AMW0 device (function SWEV = Set? WMI Event). \EV4 is the method that is called by the ...


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You could install xbacklight, a utility for managing your brightness using RandR. Then, to activate it, use a simple script along these lines—bound to your two keys: #!/usr/bin/env bash up() { xbacklight -inc 10 } down() { xbacklight -dec 10 } notify() { bright=$(</sys/class/backlight/acpi_video0/actual_brightness) if [[ "$bright" ...


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When the lid is closed, the operating system receives an ACPI event. You can configure how Linux responds to this ACPI event: by default, in your setup, this triggers suspension, so you need to change that. On Ubuntu, in the Gnome control center, you can configure what happens when the lid is closed in the “Power” tab. Change it from “Suspend” to “Do ...


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That is really dependent on your laptop. Many of them you can ignore the "lid button" or "lid closed" events and that will work. Others you need to go into the BIOS and disable Power Management in some form (all together or may just the lid). An others you simply cant. My Mac Book for example can not function if you close the lid and there is no second ...


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Edit /etc/UPower/UPower.conf and change IgnoreLid=false to IgnoreLid=true.


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One way is to create an udev rule, but as I wanted something more portable, I have this bash script. It relies on inotifywait support, does not have some kind of loops and is considered efficient. external-lcd.sh #!/bin/sh # inspired of: # ...



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