1673072 - Flickering on display when watching video on multi-display system (mixed refresh rates)

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Asif Youssuff]

From https://www.reddit.com/r/firefox/comments/jgim0d/beta_830b3_screen_flickering/g9qo22d/

I watch a twitch stream on one monitor and browsing reddit on the main one, main window starts to flicker

Main display is 2560x1440@165Hz and secondary displays are 2560x1440@59Hz

Disabling WebRender resolves the issue.

Comment 1

[Asif Youssuff]

Attachment: about:support

Comment 2

[Asif Youssuff]

Similar issue reported:

I can confirm this behavior & I'm also on 83.0b3 currently. I have a dual monitor setup and the issue is reproducible if I have a video (YouTube) playing in a window on one monitor and then mouse over various screen elements in another window on the other monitor. Sometimes you have to scroll the page a bit for it to start again, as it seems to "calm down" after while. For me it works most consistently with twitter embeds (that themselves embed images) on a forum I'm frequenting, but also to a lesser extent on twitter itself. If the video player size is reduced beyond a certain point the glitches go away. They also disappear as soon as no part of the video playback happens on the second monitor.

about:support following this comment.

Comment 3

[Asif Youssuff]

Attachment: about:support

Comment 4

[Jeff Muizelaar [:jrmuizel]]

Sounds like bug 1638709

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jimm, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 6

[Ashley Hale [:ahale]]

I think this may have been recently fixed by Microsoft, 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.

Comment 7

[Asif Youssuff]

The original poster that reported the issue to reddit has seemingly left the platform. I don't think we can do anything further with this bug.