lenovo-gentoo/POST-REBOOT-CHECKLIST.md

Post-Reboot Checklist

Date: 2025-11-05

Status: ✅ COMPLETED - All items verified and working!

This checklist guided verification of the touchpad and touchscreen functionality after rebooting with the new kernel that includes I2C HID ACPI support and CONFIG_PINCTRL_AMD.

What Was Done

1. ✅ Enabled CONFIG_I2C_HID_ACPI=m in kernel configuration
2. ✅ Enabled CONFIG_PINCTRL_AMD=y in kernel configuration (CRITICAL for GPIO interrupts)
3. ✅ Rebuilt kernel with genkernel (full rebuild, multiple attempts)
4. ✅ New kernel installed to /boot/vmlinuz-6.12.41-gentoo-x86_64
5. ✅ Backup created (.old and .backup-20251105 files)

Note: The final kernel rebuild was done WITHOUT --no-mrproper, which may have reset some kernel configurations. Bluetooth configuration may need to be verified/restored.

After Reboot: Verification Steps

1. Check Kernel Version

uname -r
# Should show: 6.12.41-gentoo-x86_64

2. Verify PINCTRL_AMD is Built-In

zcat /proc/config.gz | grep PINCTRL_AMD

Expected output:

CONFIG_PINCTRL_AMD=y

This must show =y (built-in), not =m. If it shows "is not set", the touchpad/touchscreen won't work.

3. Verify i2c-hid-acpi Module Loaded

lsmod | grep i2c_hid

Expected output:

i2c_hid_acpi          16384  0
i2c_hid               32768  1 i2c_hid_acpi

If not loaded, try loading manually:

sudo modprobe i2c-hid-acpi

4. Check Input Devices

cat /proc/bus/input/devices | grep -A 5 -i "ELAN\|touchpad\|touchscreen"

Should show both:

• ELAN901C touchpad (or similar ELAN name)
• ELAN0678 touchscreen (or similar ELAN name)

If only TrackPoint is shown, PINCTRL_AMD is likely missing or driver binding failed.

5. Test Touchpad Functionality

Basic tests:

• Move cursor with one finger
• Scroll vertically with two fingers
• Scroll horizontally with two fingers
• Right-click with two-finger tap
• Palm rejection works (no accidental touches)

6. Test Touchscreen Functionality

Basic tests:

• Tap to click/select
• Drag to move/select
• Two-finger pinch to zoom (if supported by app)
• Touch accuracy across entire screen

7. Verify Bluetooth Still Works

IMPORTANT: The kernel was rebuilt without --no-mrproper, which may have reset bluetooth configs.

# Check if bluetooth is enabled in kernel
zcat /proc/config.gz | grep "CONFIG_BT="

# Check bluetooth service
systemctl status bluetooth

If bluetooth is broken, refer to bluetooth setup documentation in this folder.

8. If Module Didn't Load Automatically

Create auto-load configuration:

echo "i2c-hid-acpi" | sudo tee /etc/modules-load.d/i2c-hid.conf

Then reboot again to verify it auto-loads.

Troubleshooting

Touchpad/Touchscreen Not Working

1. Check kernel messages:

dmesg | grep -i "i2c.*hid\|elan"

2. Verify devices on I2C bus:

ls -la /sys/bus/i2c/devices/ | grep ELAN

3. Check if module exists:

find /lib/modules/$(uname -r) -name "*i2c*hid*.ko*"

4. Verify kernel config:

zcat /proc/config.gz | grep I2C_HID

Should show:

CONFIG_I2C_HID=m
CONFIG_I2C_HID_ACPI=m

If Nothing Works

Boot into backup kernel:

• At GRUB menu, select "Advanced options"
• Choose kernel with .old suffix
• Report the issue with kernel logs

Verification Results (Post-Reboot)

✅ All Checks Passed!

Kernel Configuration Verified:

• ✅ CONFIG_PINCTRL_AMD=y (built-in, confirmed working)
• ✅ CONFIG_I2C_HID_ACPI=m (module loads automatically)

Hardware Detection:

• ✅ ELAN901C touchpad detected and functional
• ✅ ELAN0678 touchscreen detected and functional
• ✅ i2c-hid-acpi module loaded automatically

Functionality Tests:

• ✅ Touchpad cursor movement
• ✅ Multi-finger gestures (scroll, tap)
• ✅ Touchscreen touch input
• ✅ Touchscreen multitouch support

Regression Testing:

• ✅ Bluetooth still working (hci0)
• ✅ WiFi still working
• ✅ All other system functions intact

Next Steps After Verification

✅ Completed: Documentation updated in Claude.md, Touchpad-Touchscreen-Setup.md

Remaining tasks:

1. Audio control script - Create sound control utility for switching audio sources
2. Ghostty terminal - Install Wayland-native terminal emulator
3. Continue with remaining tasks - IoT tools, mobile dev setup

Documentation Files

For detailed information, see:

• Touchpad-Touchscreen-Setup.md - Complete setup guide
• Claude.md - Current system state (updated ✅)
• Session-Summary.md - All achievements to date

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System fully operational! 🚀