Update turn-off-monitors for Ubuntu 26.04

[laugeo2]

In Ubuntu 26.04 Gnome :
XDG_SESSION_DESKTOP=ubuntu

[pantoaibot]

PR Summary:

Treat Ubuntu's "ubuntu" session as GNOME Wayland: the script now matches XDG_SESSION_DESKTOP == ubuntu* and routes it to the GNOME Wayland handlers (for Ubuntu 26.04).

• Changed condition in turn-off-screen-in-wayland to: if [[ $XDG_SESSION_DESKTOP == gnome* || $XDG_SESSION_DESKTOP == ubuntu* ]].
• Intent: Ubuntu 26.04 uses "ubuntu" as the session identifier; this ensures the GNOME Wayland path (_trigger-monitors-off/on-in-gnome-wayland) is used.
• Functional effect: No change to how monitors are toggled (still uses busctl PowerSaveMode for GNOME and kscreen-doctor for KDE).
• No dependency updates, no breaking changes; error handling for unsupported desktops remains.

Reviewed by Panto AI

[pantoaibot]

[VALIDATION] The new condition adds matching for 'ubuntu*' which is good for Ubuntu 26.04, but relying solely on XDG_SESSION_DESKTOP is brittle (values vary: 'ubuntu', 'GNOME', 'ubuntu:GNOME', etc.). Normalize and check both XDG_SESSION_DESKTOP and XDG_CURRENT_DESKTOP case-insensitively so you catch variants. Example approach to replace the single if-line:

desktop="${XDG_SESSION_DESKTOP:-${XDG_CURRENT_DESKTOP:-}}"
desktop_lc=$(printf '%s' "$desktop" | tr '[:upper:]' '[:lower:]')
if [[ "$desktop_lc" == gnome* || "$desktop_lc" == gnome || "$desktop_lc" == ubuntu* ]]; then
...
fi

This handles values like 'Ubuntu:GNOME', 'gnome', 'ubuntu' and avoids false negatives.

function turn-off-screen-in-wayland()
{
    echo "Turning off monitors..."

    local desktop
    desktop="${XDG_SESSION_DESKTOP:-${XDG_CURRENT_DESKTOP:-}}"
    local desktop_lc
    desktop_lc=$(printf '%s' "$desktop" | tr '[:upper:]' '[:lower:]')

    if [[ "$desktop_lc" == gnome* || "$desktop_lc" == *gnome* || "$desktop_lc" == ubuntu* ]]; then
        _trigger-monitors-off-in-gnome-wayland

        local interaction_event
        interaction_event=$(wait_until_mouse_or_keyboard_event)
        echo "Event Type: ${interaction_event}"

        echo "Turning monitors back on..."
        _trigger-monitors-on-in-gnome-wayland

    elif [[ "$desktop_lc" == *plasma* || "$desktop_lc" == *kde* ]]; then
        _trigger-monitors-off-in-kde-wayland
    else
        echo "ERROR: Unsupported Wayland Desktop Environment: $desktop"
        exit 2
    fi
}

[pantoaibot]

Reviewed up to commit:7fa78c92e0e84479388a2788c3847b9fb1191aca

Additional Suggestion

turn-off-monitors, line:29-31

The KDE/plasma branch uses exact string comparisons ("plasma" or "KDE"); keep matching logic consistent and case-insensitive by using the same normalized variable as suggested above. For example:

elif [[ "$desktop_lc" == plasma || "$desktop_lc" == kde ]]; then
_trigger-monitors-off-in-kde-wayland

This reduces missed matches for variants like 'Plasma', 'kde', or 'KDE'.

    local desktop
    desktop="${XDG_SESSION_DESKTOP:-${XDG_CURRENT_DESKTOP:-}}"
    local desktop_lc
    desktop_lc=$(printf '%s' "$desktop" | tr '[:upper:]' '[:lower:]')

    if [[ "$desktop_lc" == gnome* || "$desktop_lc" == *gnome* || "$desktop_lc" == ubuntu* ]]; then
        _trigger-monitors-off-in-gnome-wayland
        # ...
    elif [[ "$desktop_lc" == *plasma* || "$desktop_lc" == *kde* ]]; then
        _trigger-monitors-off-in-kde-wayland
    else
        echo "ERROR: Unsupported Wayland Desktop Environment: $desktop"
        exit 2
    fi

Reviewed by Panto AI