1820318 - Terrible scrolling on https://work.nicochilla.com/ with media.wmf.vp9.enabled=True

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Mayank Bansal]

Go to https://work.nicochilla.com/
Scroll down to the bottom and scroll up again

Do this maybe a few times, then scroll the screen till the looping video of some graph thingy is on the screen
Try to scroll now.

https://share.firefox.dev/3ZGlvZ6 , https://share.firefox.dev/3yeOCXH

Windows task manager shows GPU->"Video Codec 0 " at 100%
The whole browser sort of freezes.

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

I tried toggling some overlay related prefs, but none of them helped.

Comment 3

[Mayank Bansal]

A build from Feb-21 also janks pretty hard. So this is not a new regression.

Comment 4

[Mayank Bansal]

If I set media.wmf.dxva.d3d11.enabled = False, then there is no stuttering/freeze. Profile: https://share.firefox.dev/3EWlKHu

Comment 5

[Mayank Bansal]

If i set media.wmf.vp9.enabled = False , then the extreme stutter/freeze doesnt occur. Profile: https://share.firefox.dev/3ZcnxAd
(The page is still a bit stuttery, but Chrome also stutters. )

Comment 6

[Glenn Watson [:gw]]

Sotaro, any ideas about this?

Comment 7

[Sotaro Ikeda [:sotaro]]

Mayank Bansal, can you get Firefox profile with "Media" settings?

Comment 8

[Mayank Bansal]

Media Preset + GFX threads: https://share.firefox.dev/3JgRAkJ

Comment 10

[Elle Solomina (she/her)]

I can't repeat the issue.

Comment 11

[Mayank Bansal]

I can still repro this on the latest Nightly : https://share.firefox.dev/4eCVlyG