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Environment variables for Wayland hackers - Ubuntu Community Hub Compositors generally also respect WAYLAND_DISPLAY if set Some will use wayland-0 by default, and others wayland-1 If its default display is already taken, a compositor will either count up until they find a free one or fail to start Note that the wayland- [0-9] pattern is common, but compositors can create their display with whatever name they like
Xwayland and Wayland -- best way to set enviromental variables I found out that if I export either DISPLAY=:0 or WAYLAND_DISPLAY=wayland-0 inside etc environment my desktop manager i e sway will not start, because it probably needs to export these variables but can't as they already exist So I started playing with QT_QPA_PLATFORM that takes values xcb, wayland, wayland;xcb, xcb;wayland Later runs applications with X backend first and in case of
Why dont gksu gksudo or launching a graphical application with sudo . . . If an application support Wayland API you can run it as root using sudo -EH application command The -E switch tells sudo to preserve environment variables (as well as WAYLAND_SOCKET and XDG_RUNTIME_DIR) needed to wayland applications
WAYLAND_DISPLAY is not set, defaulting to wayland-0 If you use a login manager, please logout and set the Destkop Environment to GNOME Wayland in the bottom right corner of your login screen (cog icon) I don't use a login manager, I boot straight into my account
How to keep environment variables when using sudo [closed] Perhaps the most informative documentation on environment configuration in sudo is found in the Command environment section of man 5 sudoers Here, we learn that a sudoers environment variables that are blocked by default may be "whitelisted" using the env_check or env_keep options; e g