Keyboard Issues on Ubuntu Laptops with Ryzen CPUs

Overview

When I installed Ubuntu on a laptop equipped with a Ryzen CPU, I noticed that the keyboard behavior was strange.
Specifically, when I held down a key, the same character would continue to be input even after I released it, or there was a long delay from the time I pressed the key until the input appeared.

I eventually resolved the problem by changing the Linux kernel, so I have summarized the details here.

Environment Information

• Hardware: HP Pavilion Aero 13-be2000
• CPU: AMD Ryzen 7 7735U with Radeon Graphics
• OS: Ubuntu 22.04.3 LTS
• Linux kernel version (at the time of the issue): 6.2
• Occurred on the built-in keyboard, but not on USB external keyboards

Solution

Web pages such as HP Pavilion Laptop Keyboard Issue in Ubuntu 22.04 and this one were helpful.

It seems that the cause is a change made starting from Linux kernel 5.19.10 based on the judgment that "IRQ override is not necessary on modern PCs."
It appears that the issue can be resolved by using a kernel version of 5.19.9 or earlier (not tested), or 6.5 or later.

I changed the kernel version using the following commands and confirmed that the problem did not occur after rebooting.

# Check current kernel version
uname -r  # It was 6.2.0-39-generic when the issue occurred

# Update the kernel
# Search for the version to update using 'apt search linux-image | grep generic', etc.
sudo apt install --install-recommends --install-suggests linux-image-6.5.0-14-generic

# Reboot
sudo reboot now

# Check current kernel version
uname -r  # 6.5.0-14-generic