Re: New module proposal: LightDM
- From: Piñeiro <apinheiro igalia com>
- To: smspillaz gmail com
- Cc: desktop-devel-list gnome org
- Subject: Re: New module proposal: LightDM
- Date: Thu, 21 Oct 2010 12:56:24 +0200 (CEST)
From: Sam Spilsbury <smspillaz gmail com>
> Just a few things to note:
> - It seems to spawn about 4 or 5 server instances before it actually gets to
> your session. Is this intended?
> - LightDM doesn't appear to pull in your gtkrc or anything from
> gnome-settings-daemon (eg a11y properties and the like). Will this be
And now that someone mentiones a11y properties...
Sorry, I haven't test it, but just a question. Is LigthDM accessible?
Have you try something like the Smoke Test .
As far as I see you are proposing LightDM as a replacement. Are you
proposing to remove GDM as a GNOME module and use LightDM (in the
future)? Or your plan is have both?
GDM is generally troublesome from a11y POV , but getting better.
> On Thu, Oct 21, 2010 at 12:02 PM, Robert Ancell <robert ancell gmail com>wrote:
>> I'm proposing LightDM  as a replacement for GDM. However, due to
>> the young age of the project and the importance in the desktop stack I
>> don't think it's ready for immediate adoption. I'd like to go through
>> the proposal process, encourage feedback, encourage developers to try
>> it during 3.0 and re-propose it for 3.2.
>> Why replace GDM?
>> - There are approximately 50,000 lines of code in GDM compared to
>> about 5,000 in LightDM (they are both C+gobject based). This makes it
>> significantly easier to work on.
>> - The GDM greeter is slow due to it loading the GNOME session, the
>> example GTK+ LightDM greeter is very lightweight (so is comparable to
>> the speed of the old GDM and newer display managers like LXDM).
>> - The GDM greeter has very limited themeing capabilities. A
>> contributor to LightDM (PCMan) was able to quickly write a new greeter
>> that used GtkBuilder and provided comparable themeing support to the
>> old GDM.
>> - While it is technically possible to write an alternate greeter for
>> GDM, in practise it is too difficult. LightDM has been designed from
>> the start to make writing a greeter no harder than a standard X
>> - All X server users have pretty much the same requirements beyond the
>> login GUI. By using LightDM the development effort of maintaining the
>> display manager can be shared between projects (GNOME, KDE, LXDE,
>> Once the basics are complete, there are some innovations I'd like to build
>> - Transitions between the greeter and the session (will work with the
>> GNOME Shell team to make these possible).
>> - Making the greeter provide authentication for the general desktop
>> (e.g. for PolicyKit). The display manager can run X applications that
>> use different authorization, thus stopping the session applications
>> from snooping passwords.
>> - Support for new XDMCP authentication/authorization schemes
>> The details:
>> Purpose: Cross-desktop display manager
>> Target: desktop
>> Dependencies: libglib, libpam, libxdmcp, libxcb, libck-connector,
>> libxklavier, gobject-introspection, libgtk+
>> Resource Usage: Launchpad for source control and bug tracking ,
>> tarballs in public ftp  (plan on moving to freedesktop.org)
>> Adoption: Not currently used by default anywhere, being proposed for Ubuntu
>> GNOME-ness: Display manager is cross-desktop, example GTK+ greeter is
>> fully GNOME compliant. I would recommend this module is maintained in
>> the GNOME servers to get all the build and translation support.
>> 3.0 readiness: GTK greeter currently using GTK2, but all other code
>> uses latest GNOME standards.
>> License: GPL3
>>  https://launchpad.net/lightdm
>>  http://people.ubuntu.com/~robert-ancell/lightdm/releases/
>> desktop-devel-list mailing list
>> desktop-devel-list gnome org
> Sam Spilsbury
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