Bottom of screen flashing white

Every now and then, I’m getting a white rectangle (about the entire bottom half of the screen) flashing white for a frame or two… enough to see and distract me, but it doesn’t stick around for long. The frequency doesn’t seem to be fixed, and I don’t see it at all when I’m running a full-screen game.

This doesn’t leave any graphical artifacts or cause any system instability. If it wasn’t the same size/location every time, it would almost seem like a tearing/buffering problem.

Which Linux distro are you using?

  • EndeavourOS (Arch, BTW)
  • KDE Plasma 6 desktop on Wayland

Which release version?

Rolling release, I update everything about once a week.

Which kernel are you using?

6.15.3-arch1-1

Which BIOS version are you using?

Current release version, 3.05

Which Framework Laptop 16 model are you using? (AMD Ryzen™ 7040 Series)

Ryzen 7 7840HS with Radeon RX 7700S, 64GB RAM, 4TB storage

More Details

  • UEFI graphics mode set to “Gaming” (which, AFAIK, just reserves more RAM for the iGPU)
  • Display 2560x1600 @ 165Hz
  • running normal things, currently: Firefox, Thunderbird, Lunatask, Signal, Discord, Obsidian, Konsole

I see this also, as well as the occasional GPU crashes I talked about in a separate post.