homelab/docs/troubleshooting.md

# Bluetooth keeps disconnecting - reconnecting

Solution: Change config in /etc/bluetooth/main.conf
`ControllerMode = bredr`
Then `sudo systemctl restart bluetooth`

UPDATE: It's still not fixed :(
Trying `yay -S pipewire wireplumber`
TODO test it again

# Touchpad scroll direction (libinput)

To change touchpad scroll direction on Arch Linux using libinput driver:

## Investigation steps:
1. Check which driver is used: `pacman -Q | grep -E "(synaptics|libinput)"`
2. Verify libinput config exists: `ls /usr/share/X11/xorg.conf.d/ | grep libinput`

## Solution for libinput:
Create `/etc/X11/xorg.conf.d/30-touchpad.conf`:

```
Section "InputClass"
    Identifier "touchpad"
    Driver "libinput"
    MatchIsTouchpad "on"
    Option "NaturalScrolling" "true"
    Option "Tapping" "on"
    Option "TappingDrag" "on"
    Option "DisableWhileTyping" "on"
EndSection
```

Set `NaturalScrolling` to:
- `"true"` for macOS-style (natural) scrolling
- `"false"` for traditional scrolling

Restart X11 (log out/in) or reboot to apply changes.

## Alternative: Synaptics driver (legacy)

If using the older synaptics driver instead of libinput:

### Investigation steps:
1. Check for synaptics: `pacman -Q xf86-input-synaptics`
2. Look for config: `ls /usr/share/X11/xorg.conf.d/ | grep synaptics`

### Solution:
Create `/etc/X11/xorg.conf.d/70-synaptics.conf`:

```
Section "InputClass"
    Identifier "touchpad"
    Driver "synaptics"
    MatchIsTouchpad "on"
    MatchDevicePath "/dev/input/event*"
    Option "VertScrollDelta" "-111"
    Option "HorizScrollDelta" "-111"
    Option "TapButton1" "1"
    Option "TapButton2" "3"
    Option "TapButton3" "2"
    Option "PalmDetect" "1"
    Option "SHMConfig" "on"
EndSection
```

Synaptics scroll direction options:
- `VertScrollDelta` and `HorizScrollDelta`:
  - Positive values (e.g., `"111"`) for traditional scrolling
  - Negative values (e.g., `"-111"`) for natural/reversed scrolling

**Note:** libinput is the modern standard. Consider switching from synaptics to libinput for better support and features.

# Theme switching issues

## Cross-application theme synchronization

**Issue:** Need to synchronize theme (light/dark) across tmux, nvim, and other terminal applications.

**Solution:** File-based theme management system using `~/.vim_theme`:

### Setup:

1. **Create theme switcher script** (`~/.config/tmux/themeswitch.sh`):
```bash
#!/bin/bash
if [ -f ~/.vim_theme ] && [ "$(cat ~/.vim_theme)" = "light" ]; then
    tmux set -g @catppuccin_flavor "latte"
else
    tmux set -g @catppuccin_flavor "mocha"
fi
```

2. **Add to tmux config** (`~/.config/tmux/tmux.conf`):
```bash
# Dynamic theme switching based on ~/.vim_theme file
run 'bash ~/.config/tmux/themeswitch.sh'
```

3. **Add to shell config** (`~/.zshrc`):
```bash
# Export THEME environment variable for nvim and other apps
if [ -f ~/.vim_theme ]; then
    export THEME=$(cat ~/.vim_theme)
else
    export THEME="dark"  # default
fi
```

### Usage:
```bash
# Switch to light theme
echo "light" > ~/.vim_theme

# Switch to dark theme
echo "dark" > ~/.vim_theme
```

### Benefits:
- ✅ **Single source of truth:** `~/.vim_theme` file controls all applications
- ✅ **Automatic propagation:** New terminals inherit theme via shell config
- ✅ **No environment variable issues:** File-based approach avoids tmux env var propagation problems
- ✅ **Cross-application support:** nvim reads `$THEME`, tmux uses catppuccin flavors

### Limitations:
- **Tmux live reload:** Changes require tmux config reload or session restart
- **Workaround:** Use tmux-resurrect to quickly restore sessions after restart

## Legacy: Tmux and terminal not updating after theme switch

**Issue:** After running the theme switcher script, tmux sessions and existing terminals don't reflect the new theme until restarted.

**Temporary workaround:**
- Restart tmux sessions: `tmux kill-server && tmux`
- Open new terminal windows

**Status:** ✅ **Solved** - Use file-based theme management system above

## Tmux window names showing hostname instead of command

**Issue:** Tmux windows show "homelab" (hostname) for inactive tabs but correct command names for active tabs.

**Root cause:** Catppuccin tmux theme with `@catppuccin_window_tabs_enabled on` uses different text formatting for active vs inactive windows.

**Solution:** Disable catppuccin window tabs:
```
set -g @catppuccin_window_tabs_enabled off
```

**Alternative:** Configure explicit window text for both states:
```
set -g @catppuccin_window_default_text "#W"
set -g @catppuccin_window_current_text "#W"
```

Also ensure automatic renaming is enabled:
```
setw -g automatic-rename on
setw -g allow-rename on
```

# Font and Unicode Display Issues

## Missing emoji and unicode symbols

**Issue:** Emojis show as boxes or missing characters, unicode symbols don't display properly.

**Solution:** Install comprehensive unicode font packages:
```bash
sudo pacman -S noto-fonts-emoji noto-fonts-extra
fc-cache -f
```

## Nerd Font icons not displaying

**Issue:** Developer icons (programming languages, git symbols, file types) show as blank spaces or boxes.

**Root cause:** Terminal emulator not configured to use Nerd Font as primary font.

**Solution:**
1. Install Nerd Fonts:
```bash
sudo pacman -S ttf-iosevkaterm-nerd ttf-jetbrains-mono-nerd
fc-cache -f
```

2. Configure terminal to use Nerd Font as primary font
3. For wezterm, ensure config includes:
```lua
config.font = wezterm.font_with_fallback {
    'IosevkaTerm Nerd Font',
    'JetBrainsMono Nerd Font Mono',
    'Noto Color Emoji'
}
```

**Testing:** Use printf with direct codepoints:
```bash
printf "Icons: \\ue702 \\uf121 \\uf015 \\uf07b\\n"
```

## Ancient/exotic script support

**Comprehensive coverage achieved with:**
- `noto-fonts` (base unicode)
- `noto-fonts-cjk` (Chinese/Japanese/Korean)
- `noto-fonts-emoji` (color emoji)
- `noto-fonts-extra` (additional scripts)

Successfully displays: Egyptian hieroglyphs, Cuneiform, Nordic runes, Hungarian rovás, Arabic, Chinese, Japanese, Korean, Thai, Hindi, Hebrew, Greek, Tamil.

# Cannot tile windows by drag and dropping

Keyboard workaround: Go to  Settings > Window Manager > Keyboard, set up tiling shortcuts (set to Super+arrow keys)

# Additional Known Issues (TODO Items)

## Tmux battery indicator missing until config reload

**Issue:** Battery indicator doesn't appear in tmux status line immediately after starting tmux.

**Temporary workaround:** Reload tmux config with `Prefix + r` or restart tmux session.

**Status:** Investigation needed

## TTY fallbacks needed

**Issue:** When not in X11/graphical mode, nvim and tmux need proper fallback configurations.

**Status:** Completed

**Solutions implemented:**
- ✅ **nvim:** TTY detection and color scheme fallback configured
- ✅ **Font:** Selected ter-124b (12x24 bold) for good readability
- ✅ **Keyboard:** Colemak layout with caps lock remapped to backspace
- ✅ **Caps lock fix:** Uses systemd service with `setkeycodes 3a 14`

**Configuration files:**
- `/etc/systemd/system/caps-backspace.service` - Permanent caps lock remapping
- TTY font testing script: `~/.local/scripts/test-fonts.sh`

## TTY Caps Lock Not Working as Backspace

**Issue:** With colemak keymap loaded, caps lock acts like Control instead of backspace in TTY.

**Root cause:** Colemak keymap maps caps lock to Control, which conflicts with tmux navigation keys.

**Solution:** Use `setkeycodes` to remap at scancode level:
```bash
sudo setkeycodes 3a 14  # Map caps lock scancode to backspace keycode
```

**Permanent fix:** Systemd service created at `/etc/systemd/system/caps-backspace.service`

## Laptop sleeps when lid is closed

Solution:

sudo nvim /etc/systemd/logind.conf

Uncomment and change these lines:

```
HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore
HandleLidSwitchDocked=ignore
```

Then restart service:
`sudo systemctl restart systemd-logind`

## IP addresses keep changing

Due to 3 interfaces:
* Wifi
* Ethernet left port (ThinkPad adapter) - Wired Connection 1
* Ethernet right port (regular ethernet cable) - Wired Connection 2

### Proposed solution

* Stick with wired2

● Configure static IP for "Wired connection 2" (enp4s0):

  * Set static IP to 192.168.0.100
  sudo nmcli connection modify "Wired connection 2" \
      ipv4.method manual \
      ipv4.addresses 192.168.0.100/24 \
      ipv4.gateway 192.168.0.1 \
      ipv4.dns 192.168.0.1

  * Apply the changes
  sudo nmcli connection up "Wired connection 2"

  Then configure WiFi with the same static IP:

  * First connect to your WiFi if not already
  sudo nmcli connection up "Telekom-4b28df-2.4GHz"

  * Set same static IP for WiFi
  sudo nmcli connection modify "Telekom-4b28df-2.4GHz" \
      ipv4.method manual \
      ipv4.addresses 192.168.0.100/24 \
      ipv4.gateway 192.168.0.1 \
      ipv4.dns 192.168.0.1

  Verify the configuration:
  nmcli connection show "Wired connection 2" | grep ipv4
  ip addr show enp4s0

  This way both your ethernet (enp4s0) and WiFi will use 192.168.0.100, solving your dual interface IP issue.
  Ready to run these commands?