1919456 - Canvas Elements Sometimes flicker between different elements on the same page

Status: RESOLVED DUPLICATE of bug 1924578

(Core :: Graphics: Canvas2D, defect)

Description

[Cetra]

Attachment: broken.webm

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

Opened a website with multiple canvas elements present. Soundcloud in the example I have attached, but I've seen this with a variety of websites, such as Duolingo etc... Any website that has multiple canvas elements can trigger it.

Actual results:

When a canvas element animates/changes, it flicks between itself and other elements visible on the page

Expected results:

The canvas element should not show anything from other canvas elements on the page

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: Canvas2D' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Mayank Bansal]

1. Can you copy-paste the content of your browsers about:support
2. Does this get fixed if you set "gfx.canvas.accelerated" to false in about:config ?
3. If this used to work fine in a previous version of Firefox, would you be willing to do a bisection using the mozregression tool (https://mozilla.github.io/mozregression/) ?

Comment 3

[bott.alix]

Attachment: about:support Troubleshooting Information

I have the same bug on 1.30.0, on archlinux w/ X11 and an NVIDIA gpu.
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Comment 4

[bott.alix]

(Apologies for my incomplete comment, I posted it accidentally.)
An additional note from my side:
I don't think it is switching between two elements on the page. Instead, it is flickering between the current image of the canvas, and a previous version of it. On my app, it switches back & forth between the two versions whenever a redraw occurs.

Comment 5

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

Redirect a needinfo that is pending on an inactive user to the triage owner.
:lsalzman, since the bug has recent activity, could you have a look please?

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