Graphical issue - is it software or hardware related?

Hi,

I just bought a Lenovo Thinkpad P14s Gen all AMD:
→ AMD Ryzen Pro 7 8840HS
→ 780M integrated GPU

I’ve installed F41 - KDE on it and I’m encountering some strange artefacts on the screen but also some stuttering like when I’m typing in Konsole or my web browser.

I don’t know if both issues are related or not and if it’s a software issue (like Wayland comptatibility) or a hardware defect.

Here’s a picture of the artifact (sorry for the quality - but it doesn’t show up with a screen capture).

And here’s a capture of the events logged when it happens

Let me know if you need more details.

Thanks for your help in advance!

Please provide the output of inxi -Fzxx so we can see the config. Please post that as preformatted text that you copy and paste, then highlight the text pasted and click the </> button on the toolbar of the text entry screen. This keeps the formatting seen on-screen.

Try a Linux LiveUSB for other desktop environments (Workstation for GNOME, Xfce for Xorg); if any of those work fine, it’s specific to KDE or Wayland.

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Or just try sudo dnf install plasma-workspace-x11 to start with

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Ok, so after some digging it’s definitely a Wayland issue:

And there isn’t a definitive solution…

However, it does not explain why I am experiencing lags or delay while typing in any application.

This in the end, fixed everything:

sudo nano /etc/default/grub

add amdgpu.dcdebugmask=0x10 to

GRUB_CMDLINE_LINUX="...quiet amdgpu.dcdebugmask=0x10"
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
sudo reboot
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