Add KDE Plasma installation guide and revert documentation
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nearxos
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chromium-setup/TOUCHSCREEN-DESKTOP-OPTIONS.md
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chromium-setup/TOUCHSCREEN-DESKTOP-OPTIONS.md
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# Touchscreen-Friendly Desktop Environments for reTerminal DM4
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## Current Setup
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- **Screen**: 10-inch, 1280x800 resolution
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- **Current DE**: LXDE with Openbox
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- **Display Server**: Wayland (with Xwayland)
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## Recommended Desktop Environments
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### 1. KDE Plasma (Best for Touchscreen) ⭐ RECOMMENDED
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**Pros:**
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- Excellent touch support with large touch targets
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- Built-in on-screen keyboard (Maliit)
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- Gesture support
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- Scalable UI elements
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- Modern, polished interface
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- Good performance on Raspberry Pi 5
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**Installation:**
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```bash
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sudo apt-get update
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sudo apt-get install kde-plasma-desktop
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# Or for full KDE experience:
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sudo apt-get install kde-standard
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```
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**After installation:**
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```bash
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# Set KDE as default desktop
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sudo update-alternatives --config x-session-manager
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# Select KDE/Plasma option
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# Enable touchscreen optimizations
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# In System Settings > Workspace Behavior > Desktop Effects
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# Enable touch gestures and adjust touch settings
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```
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**Size**: ~500-800 MB
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---
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### 2. GNOME (Good Touch Support)
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**Pros:**
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- Excellent touch and gesture support
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- Large, finger-friendly interface
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- Built-in on-screen keyboard (Caribou)
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- Modern, tablet-like experience
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- Good Wayland support
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**Cons:**
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- More resource-intensive than LXDE
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- May be slower on older Pi models
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**Installation:**
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```bash
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sudo apt-get update
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sudo apt-get install gnome-core
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# Or full GNOME:
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sudo apt-get install gnome
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```
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**After installation:**
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```bash
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# Set GNOME as default
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sudo update-alternatives --config x-session-manager
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# Select GNOME option
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# Enable touch optimizations in GNOME Settings
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# Settings > Universal Access > Enable on-screen keyboard
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```
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**Size**: ~1-1.5 GB
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---
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### 3. XFCE with Touch Optimizations
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**Pros:**
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- Lightweight but more touch-friendly than LXDE
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- Customizable
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- Good performance
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- Can be configured for touch
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**Installation:**
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```bash
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sudo apt-get update
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sudo apt-get install xfce4 xfce4-goodies
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# Install on-screen keyboard
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sudo apt-get install onboard
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```
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**Touch optimizations:**
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```bash
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# Increase icon sizes, touch targets
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# Configure in Settings > Appearance > Icons (set to 48px or larger)
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# Settings > Panel > Increase panel size
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```
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**Size**: ~200-300 MB
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---
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### 4. Phosh (Mobile-First Desktop)
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**Pros:**
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- Designed specifically for touch devices
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- Very lightweight
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- Mobile/tablet interface
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- Built-in on-screen keyboard
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**Cons:**
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- Less mature on Raspberry Pi
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- May require more configuration
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**Installation:**
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```bash
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sudo apt-get update
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sudo apt-get install phosh phosh-tour
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```
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**Size**: ~100-200 MB
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---
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### 5. Lomiri (Ubuntu Touch Desktop)
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**Pros:**
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- Designed for touch from the ground up
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- Mobile-first interface
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- Gesture-based navigation
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**Cons:**
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- May not be in Debian repositories
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- Requires more setup
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**Installation:**
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```bash
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# May need to add Ubuntu Touch repositories
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# Check availability in Debian repos first
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```
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---
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## Comparison Table
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| Desktop Environment | Touch Support | Performance | Size | Ease of Setup |
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|---------------------|---------------|-------------|------|---------------|
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| **KDE Plasma** | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | Medium | Easy |
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| **GNOME** | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | Large | Easy |
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| **XFCE** | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | Small | Easy |
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| **Phosh** | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | Small | Medium |
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| **LXDE (Current)** | ⭐⭐ | ⭐⭐⭐⭐⭐ | Very Small | N/A |
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---
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## Recommended: KDE Plasma
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For a 10-inch touchscreen, **KDE Plasma** offers the best balance of:
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- Touch-friendliness
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- Performance
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- Features
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- Ease of use
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## Installation Steps for KDE Plasma
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1. **Install KDE Plasma:**
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```bash
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sudo apt-get update
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sudo apt-get install kde-plasma-desktop
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```
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2. **Install on-screen keyboard:**
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```bash
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sudo apt-get install maliit-keyboard
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```
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3. **Set as default desktop:**
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```bash
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sudo update-alternatives --config x-session-manager
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# Select: /usr/bin/startplasma-wayland or /usr/bin/startplasma-x11
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```
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4. **Configure touch settings:**
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- System Settings > Input Devices > Touchpad/Touchscreen
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- Adjust touch sensitivity and gestures
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- Enable tap-to-click
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5. **Enable on-screen keyboard:**
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- System Settings > Input Devices > Virtual Keyboard
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- Enable "Show on-screen keyboard when needed"
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6. **Adjust UI scaling:**
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- System Settings > Display and Monitor
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- Set scale to 125% or 150% for better touch targets
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7. **Reboot:**
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```bash
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sudo reboot
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```
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## Switching Back to LXDE
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If you want to switch back:
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```bash
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sudo update-alternatives --config x-session-manager
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# Select LXDE option
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```
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## Touchscreen Calibration (if needed)
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```bash
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# Install calibration tool
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sudo apt-get install xinput-calibrator
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# Run calibration
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xinput_calibrator
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# Follow on-screen instructions to calibrate touch points
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```
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## Additional Touch Optimizations
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### Increase Touch Targets
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Edit `~/.gtkrc-2.0` and `~/.config/gtk-3.0/gtk.css`:
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```css
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* {
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min-width: 44px;
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min-height: 44px;
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}
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```
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### Enable Touch Gestures
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- Install `libinput-gestures`:
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```bash
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sudo apt-get install libinput-gestures
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```
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### Font Scaling
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- Increase system font size in desktop settings
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- Recommended: 12-14pt for 10-inch screens
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## Notes
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- **Wayland vs X11**: KDE Plasma and GNOME work well with Wayland, which has better touch support
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- **Performance**: KDE Plasma is well-optimized for Raspberry Pi 5
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- **Chromium**: Your existing Chromium setup will work with any desktop environment
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- **Autostart**: Your autostart configuration will work with any DE
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## Resources
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- KDE Plasma: https://kde.org/plasma-desktop/
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- GNOME: https://www.gnome.org/
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- Phosh: https://source.puri.sm/Librem5/phosh
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