1421272 - regression: List elements on salt documentation painted incorrectly

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P1)

Description

[Josh Matthews [:jdm]]

The rendered list on the right hand side of https://docs.saltstack.com/en/latest/ref/states/all/salt.states.cmd.html looks really weird when I view it with the recommended WebRender settings from https://mozillagfx.wordpress.com/2017/11/27/webrender-newsletter-10/. That page also causes the FF tab title text to disappear while it's active; when I switch to another tab, all of the tab titles reappear.

Comment 1

[Darkspirit]

Nightly 59 x64 20171128100440 de_DE 5b33b070378ae0806bed0b5e5e34de429a29e7db @ Debian Testing (KDE, Radeon RX480)
fresh profile: layers.acceleration.force-enabled, gfx.webrender.enabled, gfx.webrender.blob-images, image.mem.shared

WFM. Could you make a screenshot and copy/upload the output of about:support afterwards? Thank you.

Comment 2

[Josh Matthews [:jdm]]

Attachment: Incorrect rendering

Comment 3

[Josh Matthews [:jdm]]

This was taken on the 11/28 macOS nightly.

Comment 4

[Josh Matthews [:jdm]]

Attachment: about:support

Comment 5

[Kartikaya Gupta (email:[e-mail])]

Interesting, I don't repro it either in 11/28 macOS nightly with those prefs set. Do you have any other prefs set?

Comment 6

[Kartikaya Gupta (email:[e-mail])]

According to your about:support there don't seem to be any other relevant prefs. But you have a different graphics card than I do, maybe that's the difference.

Comment 7

[Markus Stange [:mstange]]

I can reproduce this on my machine. Disabling the box-shadow declarations in the "#sidebar-nav > ul > .current" rule makes the glitch go away.

This is an inset box-shadow with a 1px blur radius on an element with a height of 9706px.
box-shadwo: inset 0 1px 1px rgba(0,0,0,.05)

Comment 8

[Markus Stange [:mstange]]

Attachment: testcase

Comment 9

[Darkspirit]

https://bugzilla.mozilla.org/attachment.cgi?id=8933009

First regression:
2017-10-18: The locationbar got a big grey shadow.
(But even before this date that box can get black when zooming in.)
mozregression --good 2017-09-15 --bad 2017-11-29 --pref "layers.acceleration.force-enabled:true" "gfx.webrender.enabled:true" "gfx.webrendest.enabled:true" "gfx.webrender.layers-free:true" "gfx.webrender.blob-images:true" "image.mem.shared:true"
> 10:20.48 INFO: Last good revision: 65fe9a60d39dc8ddfdf805a3ffc8a217da638cab
> 10:20.49 INFO: First bad revision: 882e0b30bc0eaed2d78bee279e51b67e6ee6bbbf
> 10:20.49 INFO: Pushlog:
> https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=65fe9a60d39dc8ddfdf805a3ffc8a217da638cab&tochange=882e0b30bc0eaed2d78bee279e51b67e6ee6bbbf

> Kartikaya Gupta — Bug 1408461 - Update webrender to commit 7892f5364bc4d35c7a9b42949f0ace4cc54f8b3c. r=jrmuizel

Second regression:
2017-11-17. Assuming the first regression is "good".
"Bad" is when there are colorful/random things inside the box, or when the tab text or back button are blank.
If unsure, open a new tab, switch back and press F5.
mozregression --good 2017-11-10 --bad 2017-11-29 --pref "layers.acceleration.force-enabled:true" "gfx.webrender.enabled:true" "gfx.webrender.blob-images:true" "image.mem.shared:true"
> 9:26.24 INFO: Last good revision: ef9858e9ad38718eea180a62bb5b65561ad57d91
> 9:26.24 INFO: First bad revision: cdf4bb1c6af6e53643d2beb0f10a2ce29207ff5e
> 9:26.24 INFO: Pushlog:
> https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=ef9858e9ad38718eea180a62bb5b65561ad57d91&tochange=cdf4bb1c6af6e53643d2beb0f10a2ce29207ff5e

> cdf4bb1c6af6	Kartikaya Gupta — Bug 1417062 - Update for API change in WR PR 2043. r=nical
> 72cfd88fe0a0	Kartikaya Gupta — Bug 1417062 - Update reftest annotations for changes in WR PR 2031. r=nical
> c80c224d6b0c	Kartikaya Gupta — Bug 1417062 - Update webrender to commit d490a74c438d987122c600afca6bb2247ab38637. r=nical

Comment 10

[Darkspirit]

Attachment: Screenshot_20171129_203832.png

Comment 11

[Markus Stange [:mstange]]

I filed this as https://github.com/servo/webrender/issues/2135

Comment 12

[Josh Matthews [:jdm]]

I can no longer reproduce this problem.