Collection of various scripts and rules for happy living with t550.

What it provides:

• Brightness control with Fn+F5/F6
• Volume control with Fn+F1/F2/F3/F4
• Automatic monitor configuration on cable plug/unplug and lid close/open

To accomplish such bold goals this scripts relies on ACPI and udev notifications

Before installing this scripts you should revise and adjust to your configuration a few things:

1. Layout files in layout/. There should be script for each number of monitors you would have. Usually, it's 1 monitor (laptop's eDP1) and 2 monitors (laptop + external monitor). So there are 1.sh and 2.sh accordingly.

   You must use arandr or something like this to generate your configuration and "Save as" it to script that you'll put in layout dir.

2. Review xorg.conf.d/10-monitor.conf and adjust it to your needs.

3. Configure PulseAudio socket for accepting connections from root (see below)

4. (TODO: will fix) Configure SELinux workaround (see below)

Currently, selinux denies access from acpid scripts to access almost everything. For now, I'm suggesting set "SELINUX=permissive" in /etc/selinux/config or sudo setenforce 0, until I figure out correct policy changes for acpid.

If you want to contribute, this is what you should try to fix.

Volume control is done via acpi actions. These actions run as "root" and it will fail to work with PulseAudio because it runs under your user. One simple and dirty hack to fix this is run PulseAudio system-wide but it is strongly discouraged.

The way I suggest is allow user-wide PulseAudio server accept connections from users in specified group. To do this, just edit your /etc/pulse/default.pa and add 2 parameters "auth-group-enable" and "auth-group" to module-native-protocol-unix:

load-module module-native-protocol-unix auth-group-enable=true auth-group=pulse-access

"pulse-access" is the group created by PulseAudio installation.

After this, you may access PulseAudio under "root" user, but you have to provide server socket. To get server socket location, run pactl info and look for "Server String", usually it's /var/run/user/<your id>/pulse/native. Now, when you know server socket, test working under root with the following command:

# pactl -s /var/run/user/1000/pulse/native info
Server String: /var/run/user/1000/pulse/native
...
Default Sink: alsa_output.pci-0000_00_1b.0.analog-stereo
Default Source: alsa_input.pci-0000_00_1b.0.analog-stereo

If it works, create /root/pulse/client.conf with following content:

# CHANGE TO YOUR SOCKET
default-server = /var/run/user/1000/pulse/native