LXDE

From project home page:

The "Lightweight X11 Desktop Environment" is an extremely fast-performing and energy-saving desktop environment. Maintained by an international community of developers, it comes with a beautiful interface, multi-language support, standard keyboard short cuts and additional features like tabbed file browsing. LXDE uses less CPU and less RAM than other environments. It is especially designed for cloud computers with low hardware specifications, such as, netbooks, mobile devices (e.g. MIDs) or older computers.

Installation

LXDE requires at least lxde-common, and Openbox (or another window manager) to be installed. The group contains the full desktop.

GTK 3 version

An experimental GTK 3 build of LXDE can be installed with the group.

While it works mostly, there are some known issues with gpicview, lxappearance-obconf, lxlauncher and lxpanel.

Starting the desktop

Graphical log-in

LXDM is the default display manager for LXDE and is installed as part of the group. See also Display manager.

Console

To use startx, add to xinitrc:

Tips and tricks

Application menu editing

The application menu works by resolving the .desktop files located in /usr/share/applications/ and . To add or edit a menu item, see desktop entries. Third party menu editors can be found in the AUR (e.g. lxmed^AUR). There are also official ones like (GNOME), (MATE), etc.

Autostart

LXDE implements XDG Autostart. Applications can be automatically started in a couple of ways:

With .desktop files
Via LXsession

Each line in represents a command to be executed. If a line starts with , and the command following it crashes, the command is automatically re-executed. For example:

Bindings

Mouse and key bindings (i.e. keyboard shortcuts) are implemented with Openbox. LXDE users should follow the Openbox wiki to edit .

An optional GUI for editing the key bindings is provided by the obkey^AUR package. While it edits by default, you can direct it to the LXDE configuration as follows:

$ obkey ~/.config/openbox/lxde-rc.xml

See for more information.

Cursors

is a graphical tool to set GTK look and feel, including the cursor theme. Settings configured with LXAppearance are written to ,  and . See also Cursor themes.

Digital clock applet time

You can right click on the digital clock applet on the panel and set how it displays the current time using the strftime format. See strftime(3) for details.

Font settings

configures Openbox settings. See also Font configuration.

Keyboard layout

includes a keyboard layout applet. See Keyboard configuration in Xorg for generic instructions and #Autostart to automatically start setxkbmap in LXDE.

Screen locking

LXDE does not come with a screen locker of its own. See List of applications/Security#Screen lockers and #Autostart on how to start them.

The Screen Lock icon executes a script (located at ) which searches for a number of well known screen lockers and uses the first one it finds to lock the screen. See lxlock on GitHub.

(from the lxde-common package) lists XScreenSaver which will be launched automatically.

See DPMS on how to control the screen saver without external programs.

LXPanel icons

To change default icons for applications, see Desktop entries#Icons.

LXPanel menus

The panel's menus can be configured in /etc/xdg/menus/lxde-applications.menu as per the xdg-menu format to work with applications from other sessions (notably MATE) to add some of the function-ability that LXDE lacks.

Use a different window manager

LXsession uses the window manager defined in (Openbox by default). If this file does not exist, it searches in instead.

Replace in either file with a window manager of your choice:

For metacity:

window_manager=metacity

For compiz:

window_manager=compiz

Alternatively use as defined in #Autostart, where WM is the name of the window manager executable being started. This means that openbox will be started first on each login and will then immediately be replaced. Note that Openbox and LXDE do not share the same and keyboard shortcuts may differ. See xbindkeys.

Using a composite manager

LXDE does not enable compositing by default, which can lead to screen tearing problems. These can be remedied at the cost of a some graphical preformance by installing a composite manager, such as picom.

Troubleshooting

LXPanel crashes

With some GTK themes, launching lxpanel will lead to the following error:

lxpanel: cairo-scaled-font.c:459: _cairo_scaled_glyph_page_destroy: Assertion `!scaled_font->cache_frozen' failed.

In this case install .

If lxpanel crashes when browsing particular unicode web pages, install .

LXPanel Task Bar icon size

The icons of running applications do not match the set Icon size in Panel Settings > Geometry but are 4px smaller which makes some of them blurry. To have clear looking 32px icons in the Task Bar the set Icon size has to be 36px which would blur the icons of the rest of your active Panel Applets. To get around this create additional panel(s) and have them collectively make a single continuous looking panel by adjusting the Alignment and Margin in Panel Settings > Geometry.

Fake transparency in LXTerminal

Newer versions of the VTE terminal widget library require a compositing window manager for background transparency. The unmaintained, legacy GTK 2 version of VTE has fake transparency, where the desktop background image will show through the terminal. It you prefer fake transparency, the GTK 2 version of LXTerminal can be installed with the package.

LibreOffice theming does not work

LXDE overrides the SAL_USE_VCLPLUGIN environment variable used for theming LibreOffice in . Change the line in that file to set the theme. Upstream bug

gollark: Hmmmm... no.

gollark: There is much more detailing its many problems.

gollark: That's just a sort of preambley bit.

gollark: ```I can’t even say what’s wrong with PHP, because— okay. Imagine youhave uh, a toolbox. A set of tools. Looks okay, standard stuff inthere.You pull out a screwdriver, and you see it’s one of those weirdtri-headed things. Okay, well, that’s not very useful to you, butyou guess it comes in handy sometimes.You pull out the hammer, but to your dismay, it has the claw part onboth sides. Still serviceable though, I mean, you can hit nails withthe middle of the head holding it sideways.You pull out the pliers, but they don’t have those serratedsurfaces; it’s flat and smooth. That’s less useful, but it stillturns bolts well enough, so whatever.And on you go. Everything in the box is kind of weird and quirky,but maybe not enough to make it completely worthless. And there’s noclear problem with the set as a whole; it still has all the tools.Now imagine you meet millions of carpenters using this toolbox whotell you “well hey what’s the problem with these tools? They’re allI’ve ever used and they work fine!” And the carpenters show you thehouses they’ve built, where every room is a pentagon and the roof isupside-down. And you knock on the front door and it just collapsesinwards and they all yell at you for breaking their door.That’s what’s wrong with PHP.```From the fractal of bad design article.

gollark: Are you suggesting Assembly is fine for webapps too?