1 DSL - easy Display Setup for Laptops
2 ====================================
7 This is the documentation of DSL_, a tool to setup screens on a Linux-powered
10 DSL is targeted for a specific use-case: The laptop is used both with the
11 internal screen only, and in combination with a single external screen.
12 xrandr_ is used to detect whether an external screen is plugged in, and
13 to change the configuration according to the user's specification.
15 .. _DSL: https://www.ralfj.de/projects/dsl
16 .. _xrandr: http://www.x.org/wiki/Projects/XRandR
21 DSL features an interactive and a batched mode of use.
22 Either way, of DSL is started while no external screen is connected, it
23 enables the internal screen. It also resets the backlight to 100%, as some
24 laptops keep the backlight off if it was turned off by power-saving features.
26 It is in the case that an external screen is plugged in that the two modes
29 Simply run ``dsl.py`` to start the interactive mode. A window will pop up,
30 allowing you to select the resolution of the external screen and where it
31 will appear relative to the laptop. The option ``--frontend`` (or ``-f``) can
32 be used to choose the frontend which opens the window. Currently, the
33 frontends ``qt`` and ``zenity`` are available. DSL attempts to choose an
34 adequate frontend automatically.
36 The option ``--relative-position`` (``-f``) suppresses the interactive
37 configuration. Instead, the given given option (``left``, ``right`` or
38 ``external-only``) is applied with the default resolution of the external
41 Finally, the flag ``--internal-only`` (``-i``) tells DSL to ignore the
42 external screen and enable the internal one.
44 Automatic Configuration
45 -----------------------
47 In combination with x-on-resize_ by Keith Peckard, DSL can automatically
48 pop-up when a screen is plugged in, and automatically re-enable the internal
49 screen the external one is plugged off.
51 Besides, you may want to apply some configuration without pop-up if an
52 external screen is plugged in when you log in to your desktop environment.
54 All this is achieved by running the following shell script on log-in::
60 .. _x-on-resize: http://keithp.com/blogs/x-on-resize/
65 You can use ``~/.dsl.conf`` to tell DSL which are the names of your internal
66 and external connectors. These are the names as used by ``xrandr``.
67 The option ``internalConnector`` gives the name of the xrandr connector
68 corresponding to your internal laptop screen. All the others will be
69 considered external screens, unless you use the option ``externalConnectors``
70 to prove a (space-separated) list of connectors to be considered external by
71 DSL. Any connector not mentioned in either option will be completely ignored.
76 You can find the sources in the `git repository`_. They are provided under
77 the GPLv2_ or (at your option) any later version of the GPL.
79 .. _git repository: http://www.ralfj.de/git/dsl.git
80 .. _GPLv2: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
85 If you found a bug, or want to leave a comment, please
86 `send me a mail <mailto:post-AT-ralfj-DOT-de>`_.