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ディスプレイマネージャの変更[ubuntu]

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もともとのディスプレイマネージャはgdm3。ディスプレイマネージャをlightdmに変更するには次を実行するだけ(lightdmインストール済が前提)

$ sudo dpkg-reconfigure lightdm

これで/etc/X11/default-display-managerが書き変わるし、/etc/systemd/system/dislpay-manager.serviceも張り変わる。リブートすれば/lib/systemd/system/lightdm.serviceが自動起動される。

もとのgdm3に戻すなら

$ sudo dpkg-reconfigure gdm3

を実行する。

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