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Both gdm (based on 2.20) and gdm3 (based on 2.30) are available in Debian Squeeze. Supposing that gdm3 should replace gdm, why are they both still supported?

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closed as off topic by xenoterracide Dec 17 '10 at 15:25

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I don't find asking developer motivations to be useful or interesting –  xenoterracide Dec 16 '10 at 13:26
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@xenoterracide: I believe he meant Debian Squeeze –  Gert Dec 16 '10 at 15:16
    
@xeno It's sad that you frown upon this Question. I was asking here knowing very well I could have used Debian mailing list, but I didn't because I prefer this place (as you have noticed now). No one would have complained there, because this is a legitimate question. –  Tshepang Dec 17 '10 at 9:35
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1 Answer 1

up vote 6 down vote accepted

Googling easily leads to a message on a Debian mailing list which is in fact Debian bug #578704, a proposed addition to the release notes (snipped):

Since the rewrite has absolutely zero compatibility with previous versions, it will not be upgraded in place. Therefore, while newly installed systems will get GDM 2.30 by default for squeeze, those upgrading from lenny will keep GDM 2.20. The 2.20 version will be dropped after the squeeze release.

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