1952216 - With Layer Compositor enabled, Large parts of UI (Address bar) and UI of pages with videos turn white

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Mayank Bansal]

Enabel layer compositor
Go to https://www.youtube.com/watch?v=7JBY2kvGnps&t=22s and start the video.

AR: Large parts are white
ER: Not so

Didnt do bisection, but probably a regression from bug 1951548

Comment 1

[Mayank Bansal]

Attachment: Screenshot 2025-03-06 184145.png

Comment 2

[Mayank Bansal]

Attachment: about:support

Comment 3

[Mayank Bansal]

Though since this is disabled by default on Nightly, its not that big of a deal.

Comment 4

[Mayank Bansal]

Attachment: bandicam 2025-03-06 18-48-26-210.mp4

Comment 5

[Mayank Bansal]

This looks like what :sotaro said in https://bugzilla.mozilla.org/show_bug.cgi?id=1949102#c12

Comment 6

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

Set release status flags based on info from the regressing bug 1951548

:gw, since you are the author of the regressor, bug 1951548, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 7

[laszlo]

This and similar effects with layer compositor can also be seen today while scrolling on Facebook and on Instagram, where videos vanish after a split second when enlarged with the sound still playing. Same with the livestream on https://df1.de/live .

Comment 8

[Glenn Watson [:gw] | PTO until 6th Jan]

This one is interesting - because the test case I used to develop this patch is also showing this bug (but was working fine when I landed it). That suggests that there was perhaps some kind of merge error when rebasing, or that it's interacting badly with another patch that landed around the same time.

Comment 9

[Glenn Watson [:gw] | PTO until 6th Jan]

Attachment: Bug 1952216 - Fix ordering of compositor swap-chains in some cases with layer compositor enabled

Comment 10

[Glenn Watson [:gw] | PTO until 6th Jan]

Attachment: Bug 1952216 - Fix ordering of compositor swap-chains in some cases with layer compositor enabled

Comment 11

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/716b7fba1b35
Fix ordering of compositor swap-chains in some cases with layer compositor enabled r=gfx-reviewers,sotaro

Comment 12

[Atila Butkovits]

Backed out for causing build bustages.

Backout link: https://hg.mozilla.org/integration/autoland/rev/2c5e93eaab633733d8843a62cb87754b4690d818

Push with failures: https://treeherder.mozilla.org/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&revision=716b7fba1b354ae63f2688caebca66e66985725e

Failure log:
https://treeherder.mozilla.org/logviewer?job_id=499100891&repo=autoland&lineNumber=70004
https://treeherder.mozilla.org/logviewer?job_id=499100930&repo=autoland&lineNumber=48243
https://treeherder.mozilla.org/logviewer?job_id=499100914&repo=autoland

Comment 13

[Glenn Watson [:gw] | PTO until 6th Jan]

Fixed up the compile error due to an unused variable in some configs. Will reland after a try run.

Comment 14

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/379e49dfd5e5
Fix ordering of compositor swap-chains in some cases with layer compositor enabled r=gfx-reviewers,sotaro

Comment 15

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/379e49dfd5e5