# KDE Notes

## Fixing alt tab or taskbar icons

1. System Settings - Window Management - Window Rules - Add New...
2. Bring the buggy app window side-by-side with system settings.
3. Click "Detect Window Properties..." in the bottom.
4. Move the crosshair to the buggy window and click.
5. Click "Window class (application)".
6. Click "Add Property..." in the bottm left.
7. Click "Desktop file name".
8. Enter the base name of the desktop file

    For flatpak, check `/var/lib/flatpak/exports/share/applications/`

    For system apps, check `/usr/share/applications/`

    For user apps, check `~/.local/share/applications/`

9. Click "Apply".
10. The icon should be fixed immediately.

## KDE Connect

Allow KDE Connect via 1714-1764 tcp/udp

```bash
# Set source address to allow connections
sudo firewall-cmd \
--zone=drop \
--permanent \
--add-port=1714-1764/udp \
--add-port=1714-1764/tcp

sudo firewall-cmd --reload
```

## Automatic Display Switching

```bash
# List displays
# Builtin: eDP-2
# Roku: DP-13
# Lenovo: DP-11
kscreen-doctor -o

# Put the builtin display back to normal
kscreen-doctor \
output.eDP-2.enable \
output.eDP-2.position.0,0 \
output.eDP-2.primary \
output.eDP-2.mode.2560x1600@165 \
output.eDP-2.scale.1.25

# Show on Roku TV and Monitor
kscreen-doctor \
output.DP-11.enable \
output.DP-11.position.0,0 \
output.DP-11.mode.2560x1440@60 \
output.DP-11.scale.1 \
output.DP-13.enable \
output.DP-13.position.0,0 \
output.DP-13.mode.2560x1440@100 \
output.DP-13.scale.1 \
output.DP-13.primary \
output.eDP-2.disable

# Show only on the roku TV
kscreen-doctor \
output.DP-11.enable \
output.DP-11.position.0,0 \
output.DP-11.primary \
output.DP-11.mode.3840x2160@60 \
output.DP-11.scale.2 \
output.DP-13.disable \
output.eDP-2.disable

# Mirror the builtin display to the roku tv
kscreen-doctor \
output.DP-11.enable \
output.DP-11.position.0,0 \
output.DP-11.primary \
output.DP-11.mode.3840x2160@60 \
output.DP-11.scale.2 \
output.eDP-2.enable \
output.eDP-2.mode.1920x1080@60 \
output.eDP-2.scale.1 \
output.eDP-2.position.0,0
```