1656857 - Black dark-theme coloured box in every page (Linux)

Status: RESOLVED DUPLICATE of bug 1663273

(Core :: Graphics: WebRender, defect, P3)

Description

[marc.marina.miravitlles]

Attachment: Screenshot

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36

Steps to reproduce:

Just open Firefox and that black box shows everywhere.

Actual results:

A black box taking about half the screen from top to bottom obstructs everything. Hovering on it sometimes clears part of it and shows fields underneath.

Comment 1

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Darkspirit]

Please open about:support, click on "Copy text to clipboard" and paste it here. Thanks!

Comment 3

[Dzmitry Malyshau [:kvark]]

Also please check if this is seen in Nightly! Looks severe so far, marking as S2 until we know more.

Comment 4

[Kris Taeleman (:ktaeleman)]

@marc: Could you attach the about:support information?

Comment 5

[Darkspirit]

(In reply to marc.marina.miravitlles from comment #0)
Do you still see this bug? Please open about:support (type it into your address bar), click on "Copy text to clipboard" and paste it here. Thanks!

Comment 6

[Nicolas Frandeboeuf]

Attachment: about:support

Comment 7

[Nicolas Frandeboeuf]

Comment on attachment 9179566 [details]
about:support

Hi,

I have the same issue (unless I set gfx.webrender.all to false).

Comment 8

[Nicolas Frandeboeuf]

I just tried with Firefox nightly (freshly downloaded), same issue.

Comment 9

[Darkspirit]

1. How often/when does it occur? Reliably or only infrequently when switching tabs? When starting Firefox or when opening a new window?
2. Nightly: Does it still occur if you set gfx.webrender.all to true, but gfx.webrender.debug.picture-caching to false and restart Nightly? (bug 1518796)
3. Just out of interest: Can you still reproduce this bug if you start Nightly via terminal with $ MOZ_X11_EGL=1 path/to/firefox with WebRender enabled?

Comment 10

[Nicolas Frandeboeuf]

1. All the time, on every page I tried (even about:config)
2. gfx.webrender.debug.picture-caching isd already set to false, so I tried setting it to true, which made some green/red rectangles appear, restarted Firefox and it still has the bug. I took a screenshot as there might be interesting things on it: https://i.postimg.cc/59zjnS64/Screenshot-20201006-085020.png. The upper big green rectangle is the issue (you can see it truncating the content below)
3. No, I cannot reproduce it when using $ MOZ_X11_EGL=1 path/to/firefox (with nightly)!

Comment 11

[Darkspirit]

(In reply to Nicolas Frandeboeuf from comment #10)

1. All the time, on every page I tried (even about:config)

Could you try to find a regression range if there is one?
$ pip3 install --upgrade mozregression
$ ~/.local/bin/mozregression --good 2020-01-01 --bad 2020-10-05 --pref gfx.webrender.all:true
You can also directly launch specific dates:
$ mozregression --launch 2019-09-01 --pref gfx.webrender.all:true

2. gfx.webrender.debug.picture-caching isd already set to false, so I tried setting it to true, which made some green/red rectangles appear, restarted Firefox and it still has the bug.

Ups, sorry, that was muscle memory, I actually meant gfx.webrender.picture-caching. (bug 1518796)

3. No, I cannot reproduce it when using $ MOZ_X11_EGL=1 path/to/firefox (with nightly)!

That sounds interesting! Could you attach your about:support from Nightly with EGL and WebRender enabled? (Just to check that it actually works.)

Comment 12

[Nicolas Frandeboeuf]

Attachment: about:support from Nightly with EGL and WebRender enabled

about:support paste from a nightly Firefox launched with MOZ_X11_EGL=1 ./firefox -P -no-remote and webrender enabled.

Comment 13

[Nicolas Frandeboeuf]

Ups, sorry, that was muscle memory, I actually meant gfx.webrender.picture-caching. (bug 1518796)

Oh, that fixes it indeed! And I am a KDE user too…

I'll try and give the regression range.

Comment 14

[Nicolas Frandeboeuf]

Here it is: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=aa032cbc94551a0f6e7e821d78aa0388f998e830&tochange=bb0078598fc8d05033d58cd7c8963ec14a5b3925

Comment 15

[Darkspirit]

Thanks! bug 1460959 also caused bug 1663273 which seems to be the same with a light theme.