https://bugs.freedesktop.org/show_bug.cgi?id=78453
--- Comment #122 from Kai kai@dev.carbon-project.org --- (In reply to comment #106)
(In reply to comment #105)
Kai: did changing "Composition type" also fix the corrupted glyphs or just the title bars ? I've seen exactly one corrupted glyph in firefox so far (several hours of use) on cinnamon (but I'm not sure what cinnamon uses as I couldn't find any settings related to opengl).
Can't say for sure. With XRender I saw a corrupted glyph almost immediately on the first page I visited. Since switching to OpenGL as "compositing type" in KDE's settings, I haven't seen a corrupt glyph. But it could also be coincidence.
Just to get back to this: I'm still seeing misrendered glyphs from time to time. The way they are misrendered is different each time. Sometimes I get just a black block, sometimes what can be seen in the image I posted, etc. It's also not just limited to the browser, even though I can observe it there most often.