Yesterday I installed Fedora 40 on my new laptop and I noticed some minor screen glitches on sudden screen movements / changes, only when my screen is set to 120 Hz refresh rate. Here you can see in the picture below:
It happens both on Wayland and Xorg (less frequent on Xorg I would say)
It happens both on Gnome and KDE
It happens on multiple distros (tested Ubuntu as well)
Hardware Information:
Laptop model: Lenovo IdeaPad Pro 5 14AHP9
CPU: AMD Ryzen 7 8845HS
iGPU: AMD Radeon 780M
Screen: 16:10 | 2.8K | 120 Hz
Software Information:
OS name: Fedora Linux 40 (Workstation Edition)
Kernel version: Linux 6.9.9-200.fc40.x86_64
If you have any idea on how I could fix this, I would greatly appreciate that.
P.S: I’m not sure if this bug is related to the Fedora project, however since the fact that Fedora is my daily driver distro, I decided to post this here. If I should post it somewhere else, I ask you to kindly inform me about it.
Just sharing my experience and confirming that this is not related to fedora. In my case the artifacts were rare until the laptop went to sleep. After waking up from sleep they were constant whenever there was any animation running on the screen.
Also confirming that turning off panel self refresh (adding amdgpu.dcdebugmask=0x10 to the kernel parameter) fixed this for me (at least I haven’t seen any glitches since when before they were guaranteed to happen after wake from sleep).