1788525 - Flickering when mirroring mixed refresh rate displays on NVIDIA GeForce RTX 3080 and gfx.webrender.compositor = true

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Asif Youssuff]

Attachment: Firefox flicker w⧸ hardware acceleration [2Rmh8NgUyBU].mkv

From: https://www.reddit.com/r/firefox/comments/x2m1op/massive_flicker_on_motionanimation_started/

I just started getting massive flicker issues in Firefox for no obvious reason.

It seems to happen any time there's animation/motion in HTML/JS, including scrolling. YouTube videos don't cause it, but loading comments or scrolling on YouTube does.

I've noticed that it only happens when my monitor is at 165 Hz; 120 Hz and 60 Hz are both flawless as far as I've noticed. I plugged the 60 Hz monitor DisplayPort cable back in, and it started flickering immediately.

Comment 1

[Asif Youssuff]

Attachment: about:support

Comment 2

[Glenn Watson [:gw]]

If you go to about:config and disable gfx.webrender.compositor, restart browser, does that work around the issue?

Comment 3

[Asif Youssuff]

(In reply to Glenn Watson [:gw] from comment #2)

If you go to about:config and disable gfx.webrender.compositor, restart browser, does that work around the issue?

Per the user, it works around the issue.

Comment 4

[Ashley Hale [:ahale]]

Hi again, can you test if this is fixed now? There have been Windows updates from 2024-05-29 (Windows 11 22H2 or later) and 2024-06-25 (Windows 10 22H2) that say they fix flickering issues with video playback or compositor surfaces that may be the underlying cause; they match my mental model of this issue very closely, and I think both refer to the same fix.

Quoting a Windows 11 update https://support.microsoft.com/en-us/topic/may-29-2024-kb5037853-os-builds-22621-3672-and-22631-3672-preview-dcf14fd8-84d6-4234-9d5b-784c319cd7cf :

• This update addresses an issue that distorts parts of the screen. This occurs when you use a Chromium-based browser to play a video.

Quoting a Windows 10 update https://support.microsoft.com/en-us/topic/june-25-2024-kb5039299-os-build-19045-4598-preview-d4e3e815-fdd8-465e-8144-42afa165efed :

• This update addresses an issue that affects Direct Composition batched presentations. A brief flash of triangles or boxes show on the screen. This issue affects browsers, like Microsoft Edge, and other apps.