Artifacting and glitching on 7840HS/780M on Wayland

Brief summary of the problem:

Laptop: Lenovo 14aPH8 - Ideapad Pro 5.

Flickering, glitchy artifacts on certain screen elements during animations. This has been a recurring driver issue for a while now but upgrading to 6.5.0-35-generic has made it worse.

The issue isn't so bad at lower display resolutions or when VRR is disabled, so I usually update those settings, but having installed a fresh copy of KDE Neon I've not had the luxury of doing that before running into the artifacts again.

Hardware description:

• CPU: 7840HS
• GPU: 63:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:15bf] (rev c7)
• System Memory: 32GB
• Display(s): 2880x1800p
• Type of Display Connection: eDP (internal)

System information:

• Distro name and Version: KDE Neon 6. Based on Ubuntu 24.04.1
• Kernel version: 6.5.0-35-generic (64-bit)
• Custom kernel: N/A
• AMD official driver version: N/A

How to reproduce the issue:

Installed fresh copy of KDE Neon 6

Usually spotted first when showing the logout/poweroff dialog. The animations on this screen are notorious for causing artifacting.

Attached files:

Screenshots/video files

Hard to spot as they come and go.

Log files (for system lockups / game freezes / crashes)

N/A