1800358 - the background of the product list (www.buffalo.jp) will immediately become transparent.

Status: VERIFIED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Alice0775 White]

Steps to reproduce:

1. Open https://www.buffalo.jp/
2. Click 個人向け商品 link at header menu of the page

Actual results:
The product list will pop up. However, the background of the product list will immediately become transparent.
Screencast: https://youtu.be/Jo_Kmf_ClmE
Screencast: https://youtu.be/hpMwJzGBRj8

Expected results:
The background of the product list should not be transparent.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=45314ef92b644cdcd09ebb4980093690abc1fc73&tochange=6069ced802d8d6b98ee43470473328b4de38fb0e

Tentatively, Mark Bug 1780320 as culprit.

Comment 1

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

:gw, since you are the author of the regressor, bug 1780320, could you take a look? Also, could you set the severity field?

For more information, please visit auto_nag documentation.

Comment 2

[Alice0775 White]

Attachment: screenshot good & bad

Comment 3

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

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

For more information, please visit auto_nag documentation.

Comment 4

[Jim Mathies [:jimm]]

Still reproducible on mac and windows. Seems pretty serious.

Comment 5

[Pascal Chevrel:pascalc]

Jim, can we get some traction on this bug? This seems to cause a significant webcompat issue on this site, I don't know if this is a major site and id other sites in the wild are also affected though. Thanks

Comment 6

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

The bug is marked as tracked for firefox110 (beta) and tracked for firefox111 (nightly). However, the bug still has low severity.

:bhood, could you please increase the severity for this tracked bug? If you disagree with the tracking decision, please talk with the release managers.

For more information, please visit auto_nag documentation.

Comment 7

[Bob Hood [:bhood]]

Triage owner set this severity. I will not second-guess that.

Comment 8

[Glenn Watson [:gw]]

I'll take a look at this today / next week.

Comment 9

[Glenn Watson [:gw]]

I tried to repro this but it seems to be working correctly for me. Can anyone else confirm if they can/can't repro this locally?

Comment 10

[Glenn Watson [:gw]]

(And if anyone else is able to repro it - could you attach your about:support output to this bug, it may be device / locale / gpu specific).

Comment 11

[Alice0775 White]

Attachment: about:support

(In reply to Glenn Watson [:gw] from comment #9)

I tried to repro this but it seems to be working correctly for me. Can anyone else confirm if they can/can't repro this locally?

The issue occur depending on browser size and zoom level. See the second video of comment #0.

• resize window height / width
• zoom in / out

Comment 12

[Glenn Watson [:gw]]

Ah, I missed that part somehow - I can repro now, thanks.

Comment 13

[Glenn Watson [:gw]]

Attachment: Bug 1800358 - Fix invalid scroll root selection in some cases.

Reverts an optimization that can cause artifacts on some pages. We
need to do a deeper investigation at some point to find out why,
and then reenable the optimization.

Comment 14

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c75b59a8ae10
Fix invalid scroll root selection in some cases. r=gfx-reviewers,jrmuizel

Comment 15

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/c75b59a8ae10

Comment 16

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

The patch landed in nightly and beta is affected.
:gw, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
• If no, please set status-firefox110 to wontfix.

For more information, please visit auto_nag documentation.

Comment 17

[Glenn Watson [:gw]]

Comment on attachment 9314411 [details]
Bug 1800358 - Fix invalid scroll root selection in some cases.

Beta/Release Uplift Approval Request

• User impact if declined: Incorrect rendering on some pages.
• Is this code covered by automated tests?: No
• Has the fix been verified in Nightly?: Yes
• Needs manual test from QE?: Yes
• If yes, steps to reproduce: Per bug report comments.
• List of other uplifts needed: None
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): It's a very small patch, and is a revert of an optimization, so unlikely to break anything.
• String changes made/needed:
• Is Android affected?: Yes

Comment 18

[Pascal Chevrel:pascalc]

Comment on attachment 9314411 [details]
Bug 1800358 - Fix invalid scroll root selection in some cases.

Approved for 110 beta 8, thanks.

Comment 19

[Pascal Chevrel:pascalc]

https://hg.mozilla.org/releases/mozilla-beta/rev/cb10e73d20f1

Comment 20

[Ciprian Georgiu, Desktop QA]

I have reproduced this issue with Win 10 x64 on an affected Nightly build from 2022-11-12.

The issue is verified as fixed on latest Nightly 111.0a1 running Win 10 x64, Ubuntu 18.04 x64 and macOS 11. I'll verify this on Beta 110 as well, once the builds are available on treeherder.

Comment 21

[Ciprian Georgiu, Desktop QA]

The issue is also verified as fixed on Beta 110.0b8 under Win 10 x64, macOS 11 and Ubuntu 18.04 x64.