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Kubuntu 26.04 users advised to install emacs-pgtk for Wayland compatibility

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Kubuntu's 26.04 release uses a Wayland-based desktop, though most X11 applications still run, with xmag being a notable exception. Users running Emacs should install the emacs-pgtk package rather than the standard emacs package. The standard package causes problems such as preventing the Emacs window from being resized freely. The 'pgtk' name stands for 'pure GTK,' meaning Emacs uses only GTK calls instead of a mix of GTK and X11.

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