dockmonitortool

• 2017-04-23: Version 0.1 - initial version

This is a trivially simple tool for automatically setting the right display settings depending on whether your laptop is in the docking station or not. It periodically monitors the dock file in sysfs, and if its state changes it runs the corresponding display setting command.

This is most likely not useful for X11-users that run a heavy display manager such as Gnome or KDE, but if you are running a lightweight setup with only X11 and a minimal window manager such as dwm, evilwm etc, it can be most useful.

Before building, you need to adjust three constants in dockmonitortool.c.

1. #define DOCK <dockfile in sysfs>

   Specify the file in sysfs corresponding to your dock. It is a file that contains integer 0 when no dock is present, and an integer with another value when a dock is present. This may vary between different hardware, so you need to find the file that is right for your system. On my laptop I use: =#define DOCK "/sys/devices/platform/hp-wmi/dock"=

2. #define CMD_DOCK and #define CMD_NODOCK

   Define the two xrandr commands which you use to set your preferred display settings when docked and undocked. If you are unsure what those commands are, you can use the program arandr to interactively adjust the display, and saving the resulting settings to a file containing the exact xrandr command line to use.

• autoreconf --install
• ./configure (--prefix...)
• make all (install)

You can run it however you like from within your X11 session. The easiest way is to add it to your ~/.xinitrc:

nice dockmonitortool &