Display Issue on Ubuntu 24.04 with kernel 6.8

Problem Description

On Ubuntu 24.04 LTS with kernel 6.8 (specifically 6.8.0-52.53~22.04.1), a major display issue occurs when booting the system.

Symptoms

• Black screen at startup
• No brightness control
• Need to use recovery mode to access the system

Hardware Configuration

• Lenovo Yoga Pro 7 14ASP9
• Processor: AMD Ryzen AI 9 365
• Integrated Graphics Card: AMD Radeon 880M

Working Solution

1. Upgrade to kernel 6.12 LTS

sudo add-apt-repository ppa:cappelikan/ppa
sudo apt update
sudo apt install mainline
sudo mainline install-latest

After installation, restart the system.

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2. Switch from Wayland to X11 (to resolve lags)

Edit the GDM configuration file:

sudo nano /etc/gdm3/custom.conf

Uncomment (remove the #) the following line to disable Wayland:

WaylandEnable=false

Restart the system or the GDM service:

sudo systemctl restart gdm3

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This README documents a personal troubleshooting experience. Solutions may vary depending on the exact hardware configuration and operating system version. Thanks to perplexity for that.