1714437 - Flickery graphics on M1 MacBook Air

Status: REOPENED

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

Description

[Andrew Overholt [:overholt]]

Attachment: firefox89flicker - 2.mov

See the videos I'll attach. Weird flickering in release (89) on an up to date (macOS 11.4) late 2020 M1 MacBook Air. Doesn't occur on the same machine in Nightly (and didn't while Nightly was 89).

Video of when I first noticed it: https://drive.google.com/file/d/1Tturipq-Yip5nK4mdVdxmxEkJXUKqmP4/view?usp=sharing

Video of a second time I noticed it attached.

Comment 1

[Andrew Overholt [:overholt]]

Attachment: firefox89aboutsupport.html

Comment 2

[Andrew Overholt [:overholt]]

Hilariously, it looks like I somehow manually set SWGL to be on. With those prefs set to default, things look great! :)

Comment 3

[Jeff Muizelaar [:jrmuizel]]

It still shouldn't flicker with swgl on. The priority for fixing it is just low. Markus, can you reproduce this?

Comment 4

[Markus Stange [:mstange]]

I've been running swgl on my M1 machine for a few weeks now and haven't noticed anything like this. But I've been running Nightly, not Release, so maybe the bug is already fixed.

Comment 5

[Markus Stange [:mstange]]

I will test 89 release.

Comment 6

[Markus Stange [:mstange]]

89 seems to work well so far, no flicker.