Comment 9 for bug 585853

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Patrick Welche (prlw1) wrote : Re: [Lucid] Not possible to use xdm, only can use gdm

Now I see how I was "lucky" in 7:

If you run gdm, kill it, then xdm will work.
Somehow gdm manages to initialise drm, ie avoids:

(EE) intel(0): [drm] failed to set drm interface version.
(EE) intel(0): Failed to become DRM master.

So simply, I had a some stage run gdm => xdm thereafter, no matter what I tried, would work.

Any clues anyone? (This is an intel (xdriinfo says i965) which I think means that the X driver needs kernel support. What stumps me, is that gdm works, therefore the kernel support must be there, and the driver OK - but what is the difference between the way gdm calls Xorg and the way xdm calls it?)