1606840 - Occasional shiny artifacts in the tab bar with WebRender on macOS

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P3)

Description

[Jeff Muizelaar [:jrmuizel]]

I've been seeing this the last couple of days. It's very brief and I can't reproduce reliably.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

This seems to happen in the top couple of pixels of the window. I notice it most on page load. The white perhaps comes from the window underneath.

Comment 2

[Markus Stange [:mstange]]

I see a similar thing with non-WebRender. Just now I saw a yellow artifact (maybe 2x2 pixels) on top of the active tab's blue top line. So it looks like this is not necessarily a vibrancy thing.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

I haven't noticed this in the last couple of days.

Comment 4

[Jeff Muizelaar [:jrmuizel]]

It's back now. I think I had turned off gfx.webrender.compositor so presumably this is connected to that.

Comment 5

[Connor Brewster [:cbrewster]]

I have also noticed this.

It looks like this may happen to other applications on macOS as well: https://apple.stackexchange.com/questions/338319/red-pixels-on-mojave-and-catalina-dark-mode

Comment 6

[Connor Brewster [:cbrewster]]

Attachment: red-artifact.jpeg

Comment 7

[Dirkjan Ochtman (:djc)]

I'm seeing a similar glitch, see here: https://drive.google.com/file/d/1nU-fRCYSoHJF6coheyHSo3jp9mRkXTVs/view.

I've been seeing small greyish squares that jump around along the top of the window for months now (not sure when it started). This particular variant (with a more yellowish/orange square in the top left of the window) is new to me. Running Nightly with WebRender enabled on macOS Catalina (15" MacBook Pro).

Comment 8

[Glenn Watson [:gw]]

I believe this is fixed now?