KDE Plasma 6.2.5 minor rendering corruption

[yanfali]

Loving ghostty so far, but I've been noticing a minor corruption around the edges of the terminal. If you drag your mouse around the very top edge of the terminal and around straight edges of the tabs, you will see sparkly corruption. You can see it in the following screenshot. I just dragged my mouse from right to left along the top of the screen to create this. It's not static, it actually seems to twinkle and animate like it's some buffer data getting rendered and swapped out.

System details from the plasma about panel:

Terminal inspector:

Please let me know if you need any more info

[pluiedev]

Couldn't reproduce on my end (Plasma 6.2.5). This looks more like a GPU/driver issue — do other OpenGL programs exhibit similar behavior?

[yanfali]

Couldn't reproduce on my end (Plasma 6.2.5). This looks more like a GPU/driver issue — do other OpenGL programs exhibit similar behavior?

Sadly no. It's only ghostty and it's 100% reproducible on my end. 😢

[maciekglowka]

I am having similar glitches in Gnome 47 (Fedora 41) on Wayland. The GPU is: HD Graphics 530 (SKL GT2)
Also I am using fractional scaling in Gnome (125%) - maybe that's causing the issue.

It's not 100% reproducible in my case. It happens from time to time (I think usually above the tab bar).

Resizing the window helps - eg. if it happens when maximized, I can change the window size for an instant and then it's fixed also when back to maximized.

[yanfali]

Oh good point. I'm also using fractional scaling. 175% 🤓

[pluiedev]

Couldn't repro even with fractional scaling... I'm still convinced that this is either a GTK bug or an OpenGL driver bug though, since we don't do anything special on resizing

[yanfali]

Not disagreeing with you per-se but we have 2 reports on 2 different driver stacks, so that's something at least.

[yanfali]

BTW, this isn't during resize for me. I just need to move the mouse pointer near the border of the window to trigger it. It also triggers when you have multiple tabs open.

[yanfali]

OK, as of QT 6.8.2 the problem has gone away. Must have been a bug in the library. Thank you and sorry for the false report.