documentation/TOUCHPAD_TROUBLESHOOTING.md

@@ -1,98 +0,0 @@
-# Touchpad Troubleshooting - Little Rascal (Lenovo Yoga Slim 7)
-
-## Problem
-The touchpad on little-rascal (Lenovo Yoga Slim 7 14ARE05) is not working. The trackpad is detected as an I2C HID device but is being misidentified as a sensor hub instead of a proper touchpad.
-
-## Hardware Details
-- **Model**: Lenovo Yoga Slim 7 14ARE05
-- **Touchpad Controller**: ITE8353 (I2C HID)
-- **Device Path**: `/sys/bus/i2c/devices/i2c-ITE8353:00`
-- **HID Device**: `0018:048D:8353.0001`
-- **ACPI ID**: `PNP0C50` (HID-over-I2C precision touchpad)
-
-## Investigation Results
-
-### Device Detection
-The touchpad controller is properly detected by the kernel:
-- I2C device exists at `i2c-ITE8353:00`
-- Driver binding: `i2c_hid_acpi`
-- HID device: `0018:048D:8353.0001`
-
-### Problem: Misidentified as Sensor Hub
-The device is being bound to `hid-sensor-hub` driver instead of a proper touchpad driver like `hid-multitouch`.
-
-### Attempted Solutions
-
-1. **Added I2C HID kernel modules**:
-   - `i2c_hid`, `i2c_hid_acpi`, `hid_multitouch`
-   - Added to both `boot.kernelModules` and `boot.initrd.availableKernelModules`
-
-2. **Added kernel parameters**:
-   - `i2c_hid.debug=1`
-   - `acpi_enforce_resources=lax`
-   - `i2c_hid_acpi.probe_defer=1`
-
-3. **Added udev rules**:
-   - Attempted to unbind from `hid-sensor-hub` and bind to `hid-multitouch`
-   - Set proper permissions for the device
-
-4. **Enabled libinput**:
-   - Configured touchpad settings in `modules/desktop/input.nix`
-   - Added input utilities (`evtest`, `xinput`, `libinput-gestures`)
-
-### Current Status
-- ❌ Touchpad still not functional
-- ✅ Device is detected by kernel
-- ❌ Device is misidentified as sensor hub
-- ❌ No input events generated
-
-## Next Steps to Try
-
-### Option 1: BIOS Settings
-Check BIOS for touchpad mode settings:
-- Look for "Touchpad Mode" setting
-- Try switching between "Basic" and "Advanced" modes
-- Some laptops have I2C/PS2 mode selection
-
-### Option 2: Kernel Patch
-This appears to be a known issue requiring a kernel patch. Research:
-- Linux kernel patches for ITE8353 touchpad support
-- Check if newer kernels have better support
-- Look for device-specific quirks in the kernel
-
-### Option 3: Force PS/2 Mode
-If I2C mode cannot be made to work:
-- Try to enable PS/2 emulation mode in BIOS
-- Some laptops can fall back to PS/2 touchpad mode
-
-### Option 4: Custom Driver
-- Check if ITE provides Linux drivers
-- Look for community-developed drivers for this specific controller
-
-### Option 5: Firmware Update
-- Update laptop firmware/BIOS
-- Some touchpad issues are resolved with firmware updates
-
-## Useful Commands for Further Debugging
-
-```bash
-# Check device binding
-ls -la /sys/bus/i2c/devices/i2c-ITE8353:00/driver
-
-# Check HID devices
-cat /sys/bus/i2c/devices/i2c-ITE8353:00/0018:048D:8353.0001/modalias
-
-# Monitor udev events
-udevadm monitor --environment --udev
-
-# Test input events
-evtest
-
-# Check kernel modules
-lsmod | grep -E "(i2c|hid)"
-```
-
-## References
-- [NixOS Hardware Configuration](https://github.com/NixOS/nixos-hardware)
-- [Linux I2C HID Documentation](https://www.kernel.org/doc/html/latest/input/devices/i2c-hid.html)
-- [Libinput Documentation](https://wayland.freedesktop.org/libinput/doc/latest/)

machines/little-rascal/configuration.nix

@@ -21,7 +21,6 @@
     ../../modules/desktop/niri.nix
     ../../modules/desktop/cosmic.nix
     ../../modules/desktop/fonts.nix
-    ../../modules/desktop/input.nix
 
     # Development
     ../../modules/development/tools.nix

machines/little-rascal/hardware-configuration.nix

@@ -20,22 +20,11 @@
         "usb_storage"
         "sd_mod"
         "sdhci_pci"
-        # I2C modules for touchpad support
-        "i2c_hid"
-        "i2c_hid_acpi"
-        "i2c_piix4"
       ];
       kernelModules = [];
     };
 
-    kernelModules = [
+    kernelModules = ["kvm-amd"]; # AMD Ryzen system
-      "kvm-amd" # AMD Ryzen system
-      # HID and input modules for touchpad
-      "hid_generic"
-      "hid_multitouch"
-      "i2c_hid"
-      "i2c_hid_acpi"
-    ];
     extraModulePackages = [];
   };
 
@@ -69,18 +58,20 @@
     enableRedistributableFirmware = true;
 
     # Graphics configuration - AMD Radeon Vega (integrated)
-    # Using open source driver without ROCm and 32-bit support
     graphics = {
       enable = true;
-      enable32Bit = false; # Disabled 32-bit support
+      enable32Bit = true;
 
-      # AMD open source graphics drivers only
+      # AMD integrated graphics drivers
       extraPackages = with pkgs; [
         amdvlk # AMD Vulkan driver
-        # Removed ROCm packages for simpler configuration
+        rocmPackages.clr.icd # OpenCL support
       ];
 
-      # No 32-bit support packages needed
+      # 32-bit support for compatibility
+      extraPackages32 = with pkgs.driversi686Linux; [
+        amdvlk
+      ];
     };
 
     # Bluetooth support for Intel AX200
@@ -90,17 +81,6 @@
     };
   };
 
-  # Additional services for touchpad support
-  services.udev.extraRules = ''
-    # ITE8353 touchpad support - try to force proper driver binding
-    SUBSYSTEM=="i2c", KERNEL=="i2c-ITE8353:00", MODE="0664", GROUP="input"
-    SUBSYSTEM=="input", ATTRS{name}=="ITE8353:00*", MODE="0664", GROUP="input"
-    # Additional HID rules for touchpads
-    KERNEL=="hidraw*", ATTRS{idVendor}=="048d", ATTRS{idProduct}=="8353", MODE="0664", GROUP="input"
-    # Force unbind from hid_sensor_hub and rebind to hid_multitouch for ITE8353
-    ACTION=="add", SUBSYSTEM=="hid", ATTRS{idVendor}=="048d", ATTRS{idProduct}=="8353", ATTR{bInterfaceClass}=="03", ATTR{bInterfaceSubClass}=="01", ATTR{bInterfaceProtocol}=="02", RUN+="/bin/sh -c 'echo $kernel > /sys/bus/hid/drivers/hid-sensor-hub/unbind; echo $kernel > /sys/bus/hid/drivers/hid-multitouch/bind'"
-  '';
-
   # Power management for AMD Ryzen 7 4700U
   powerManagement = {
     enable = true;
@@ -126,12 +106,6 @@
   boot.kernelParams = [
     # Enable AMD graphics performance
     "amdgpu.ppfeaturemask=0xffffffff"
-    # I2C HID touchpad parameters
-    "i2c_hid.debug=1"
-    # Ensure ACPI devices are properly detected
-    "acpi_enforce_resources=lax"
-    # Force ITE touchpad to be recognized as input device
-    "i2c_hid_acpi.probe_defer=1"
   ];
 
   # TLP for better power management (alternative to power-profiles-daemon)

modules/desktop/input.nix

@@ -1,54 +0,0 @@
-# Input Configuration Module
-# Handles touchpad, keyboard, and other input devices
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}: {
-  # Enable libinput for touchpad support
-  # This is the recommended touchpad driver for NixOS since 17.09
-  services.libinput = {
-    enable = true;
-
-    # Touchpad-specific settings
-    touchpad = {
-      # Enable tap-to-click (can be disabled if unwanted)
-      tapping = true;
-
-      # Enable two-finger scrolling
-      scrollMethod = "twofinger";
-
-      # Enable natural scrolling (macOS-style, disable if you prefer traditional)
-      naturalScrolling = false;
-
-      # Disable touchpad while typing to prevent accidental input
-      disableWhileTyping = true;
-
-      # Middle button emulation (three-finger tap)
-      middleEmulation = true;
-    };
-
-    # Mouse settings (for external mice)
-    mouse = {
-      # Standard settings for mice
-      naturalScrolling = false;
-      accelProfile = "adaptive";
-    };
-  };
-
-  # Additional input packages that might be useful
-  environment.systemPackages = with pkgs; [
-    # Input device utilities
-    libinput-gestures # For custom touchpad gestures
-    evtest # For testing input devices
-    xorg.xinput # X11 input device utility (still useful in Wayland)
-  ];
-
-  # Enable support for additional input methods if needed
-  # (This is separate from touchpad functionality)
-  i18n.inputMethod = {
-    enable = false; # Set to true if you need input methods for other languages
-    # type = "ibus";  # Uncomment and configure if needed
-  };
-}

scripts/diagnose-trackpad.sh

@@ -1,85 +0,0 @@
-#!/usr/bin/env bash
-# Trackpad Diagnostic Script for Little-Rascal
-# This script helps diagnose trackpad issues on NixOS
-
-echo "=== Little-Rascal Trackpad Diagnostics ==="
-echo "Date: $(date)"
-echo
-
-echo "1. Checking for input devices..."
-if command -v libinput >/dev/null 2>&1; then
-    echo "   ✓ libinput is available"
-    echo "   Input devices detected by libinput:"
-    sudo libinput list-devices | grep -E "(Device:|Capabilities:)" | head -20
-else
-    echo "   ✗ libinput not found - this could be the problem!"
-fi
-echo
-
-echo "2. Checking systemd services..."
-if systemctl is-active --quiet systemd-logind; then
-    echo "   ✓ systemd-logind is running"
-else
-    echo "   ✗ systemd-logind is not running"
-fi
-echo
-
-echo "3. Checking for trackpad hardware..."
-if ls /dev/input/mouse* >/dev/null 2>&1; then
-    echo "   ✓ Mouse devices found:"
-    ls -la /dev/input/mouse*
-else
-    echo "   ⚠ No mouse devices found in /dev/input/"
-fi
-
-if ls /dev/input/event* >/dev/null 2>&1; then
-    echo "   ✓ Event devices found:"
-    ls -la /dev/input/event* | wc -l
-    echo "     Total event devices: $(ls /dev/input/event* | wc -l)"
-else
-    echo "   ✗ No event devices found"
-fi
-echo
-
-echo "4. Checking kernel modules..."
-modules=("i2c_hid" "hid_multitouch" "psmouse")
-for module in "${modules[@]}"; do
-    if lsmod | grep -q "$module"; then
-        echo "   ✓ $module module is loaded"
-    else
-        echo "   ⚠ $module module not loaded (may not be needed)"
-    fi
-done
-echo
-
-echo "5. Checking for specific laptop touchpad info..."
-if command -v dmesg >/dev/null 2>&1; then
-    echo "   Recent touchpad-related kernel messages:"
-    dmesg | grep -i -E "(touchpad|synaptics|elan|input)" | tail -5
-fi
-echo
-
-echo "6. User permissions..."
-echo "   Current user: $(whoami)"
-echo "   User groups: $(groups)"
-if groups | grep -q input; then
-    echo "   ✓ User is in 'input' group"
-else
-    echo "   ⚠ User not in 'input' group (usually not required on NixOS)"
-fi
-echo
-
-echo "=== Recommendations ==="
-echo "If trackpad still doesn't work after enabling libinput:"
-echo "1. Reboot the system to ensure all changes take effect"
-echo "2. Try: sudo libinput debug-events (to see if events are being detected)"
-echo "3. Check dmesg for hardware detection issues"
-echo "4. Consider adding specific kernel modules if hardware isn't detected"
-echo
-
-echo "=== Configuration Status ==="
-if grep -q "services.libinput.enable.*true" /etc/nixos/configuration.nix 2>/dev/null; then
-    echo "   ✓ libinput appears to be enabled in configuration"
-else
-    echo "   ⚠ libinput may not be enabled - check your NixOS configuration"
-fi