KDE, Qt & LightDM: Progress Made
Written by Michael Larabel in Qt on 2 June 2011 at 07:07 AM EDT. Add A Comment
LightDM, the cross-desktop display manager that provides a clean API for writing multiple user-interfaces and for delivering fast performance, continues to mature. With the Ubuntu 11.10 release in October, Ubuntu is using LightDM instead of the GDM from GNOME as the display / log-in manager. For those concerned that the KDE side may be not getting enough love, it actually is and there's been progress made on a Qt-powered interface.

David Edmundson, a KDE developer, has written a Qt library for making simple greeter engines. "I've written a Qt library for making greeter engines, as well as a very basic demo greeter which is more for testing than a real demo of what can be done. This library is designed to be very QML-ready, with a strong emphasis on using models rather than simple lists." LightDM is meant to be extended to handle various interfaces from Qt or GTK to having HTML/CSS-driven interfaces for this promising log-in manager.

Additionally, David had mentioned, "I've got an idea in my head for the direction I want to take it with QML themes that will be hopefully lead to the same broad range of designs that KDM has, but more flexible whilst keeping a really sensible config dialog."

Another KDE developer, Alex Fiestas, has been working on improvements in KDE SC 4.7 so that suspend / shutdown / user-switching can be done from the KDE desktop while using LightDM.

More details can be found in this blog post. Beyond allowing multiple interfaces/greeters to be written on-top and delivering fast performance, LightDM also prides itself on having low code complexity and support for plug-ins. Additional details can be found on its FreeDesktop.org page.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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