Language Selection

English French German Italian Portuguese Spanish

LightDM, or: an examination of a misunderstanding of the problem

Filed under
Software

LightDM's a from-scratch implementation of an X display manager, ie the piece of software that handles remote X connections, starts any local X servers, provides a login screen and kicks off the initial user session. It's split into a nominally desktop-agnostic core (built directly on xcb and glib) and greeters, the idea being that it's straightforward to implement an environment-specific greeter that integrates nicely with your desktop session. It's about 6500 lines of code in the core, 3500 lines of code in the gtk bindings to the core and about 1000 in the sample gtk greeter, for a total of about 11,000 lines of code for a full implementation. This compares to getting on for 60,000 in gdm. Ubuntu plan to switch to LightDM in their next release (11.10).

This is a ridiculous idea.

To a first approximation, when someone says "Lightweight" what they mean is "I don't understand the problems that the alternative solves".

rest here




More in Tux Machines

Firefox OS media-casting stick strikes Kickstarter gold

The first Firefox OS based media player has arrived on Kickstarter, in the form of a $25 open-spec HDMI stick that supports Chromecast-like content casting. The Matchstick, which has already zoomed past its Kickstarter campaign’s $100,000 funding goal, with 28 days still remaining, was teased back in June by Mozilla developer evangelist Christian Heilmann. The unnamed prototype was billed as an open source HDMI stick that runs Mozilla’s Linux-based Firefox OS and offers casting capabilities. Few details were revealed at the time except that the device used the same DIAL (DIscovery And Launch) media-casting protocol created by Netflix and popularized by Google’s Chromecast. Read more

Open source history, present day, and licensing

Looking at open source softwares particularly, this is a fact that is probably useful to you if you are thinking about business models, many people don't care about it anymore. We talk about FOSS, Free and Open Source Software, but if we really are strict there's a difference between free software and open source software. On the left, I have free software which most typically is GPL software. Software where the license insures freedom. It gives freedoms to you as a user, but it also requires that the freedoms are maintained. On the right-hand side, you have open source software which is open for all, but it also allows you to close it. So here we come back to the famous clause of the GPL license, the reciprocity requirement which says, "If I am open, you need to be open." So software that comes under the GPL license carries with it something that other people call a virus. I call it a blessing because I think it's great if all software becomes open. Read more

Leftovers: Software

Proprietary

today's howtos