1563142 - gfx.debug.webrender.show-overdraw stops main window from rendering

Status: RESOLVED WORKSFORME

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

Description

[jkillelea344]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0

Steps to reproduce:

In latest Nightly, set
layers.acceleration.force-enabled to true
gfx.webrender.enabled to true
gfx.webrender.debug.show-overdraw to true

Ubuntu 16.04 x86_64 with Nvidia 384.130 driver.

Actual results:

Stopping and restarting Nightly causes the main window not to render, and instead there is a translucent yellow layer in its place.

Expected results:

The main window should have rendered, probably along with the translucent yellow layer.

Comment 1

[jkillelea344]

Attachment: Screenshot from 2019-07-02 19-42-19.png

View of the yellow layer. There appear to be additional layers where the URL bar and each tab should be.

Comment 2

[Darkspirit]

Confirmed with

• Ubuntu 19.04, GTX1060
• Debian Testing, KDE, X11, Intel Iris 6100 (Broadwell GT3)

This is mostly intended, but the window was not transparent in the past.
You shouldn't flip that pref without knowing where to click to reset it. :D

When it became transparent (tested on Debian Testing):
mozregression --good 2019-01-15 --bad 2019-02-15 --pref gfx.webrender.all:true gfx.webrender.debug.show-overdraw:true

9:44.94 INFO: Last good revision: 23d99110fdbca7dd2447cd2b9bc6f0db6ae48275
9:44.94 INFO: First bad revision: 2ce3a517eb67017ad75c78072e648a91ac6318dc
9:44.94 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=23d99110fdbca7dd2447cd2b9bc6f0db6ae48275&tochange=2ce3a517eb67017ad75c78072e648a91ac6318dc

2ce3a517eb67017ad75c78072e648a91ac6318dc sotaro — Bug 1524168 - Request AlphaVisual for WebRender r=jrmuizel