1603360 - Display garbled unless Chrome is also running, since version 70

Status: RESOLVED INACTIVE

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

Description

[Magnus Reftel]

Attachment: How mozilla.org looks when Chrome is not running

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:71.0) Gecko/20100101 Firefox/71.0

Steps to reproduce:

Go to any web page after updating to Firefox 70, while Chrome is not running.
This is on an early 2011 MacBook Pro running macOS 10.13.6 (17G9016) with a 15,4-inch (1680 x 1050) display and an AMD Radeon HD 6490M 256 MB graphics card, with both Firefox version 70 and 71.

Actual results:

Display is unreadable. Text looks like black blocks, images are (mostly) single-colour solid rectangles (see attached screenshot)

Expected results:

Page should have been displayed as it was in earlier versions, or as it is in 70 when Chrome is running. Starting Chrome in the background makes Firefox render the page correctly. Quitting Chrome immediately makes Firefox display garbled graphics again.

Comment 1

[Gingerbread Man]

Please do the following:

1. Enter about:support into the address bar.
2. Click the Copy text to clipboard button.
3. Paste the clipboard contents into a text editor and save the file.
4. Click the Attach New File button above the description here to upload it.

Comment 2

[Magnus Reftel]

Attachment: about_support.txt

Comment 3

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

The priority flag is not set for this bug.
:jbonisteel, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Jessie [:jbonisteel] pls NI]

Hi Magnus - it looks like you are using WebRender. Can you go to about:config and set gfx.webrender.all to false, restart your browser and see if this issue still happens?

Comment 5

[Magnus Reftel]

Changed the setting and restarted. Can't reproduce the problem with gfx.webrender.all set to false, and the problem comes back when setting it back to true and restarting.

Comment 6

[Timothy Nikkel (:tnikkel)]

Looks like your running release. Do you still see the problem if you try nightly (in a different profile)?

Comment 7

[Magnus Reftel]

Attachment: Screen Shot 2020-02-05 at 21.12.04 .png

Comment 8

[Magnus Reftel]

Sorry for not getting back earlier. I'm not being able to reproduce the issue, since a different display artifact (can't tell whether it's related to the issue causing the display artifact reported above), also specific to Firefox, is happening now. I'm attaching a screenshot of how things look as of 72.0.2, with webrender enabled. With webrender disabled, everything seems fine.

Comment 9

[Jessie [:jbonisteel] pls NI]

Do you have clear steps to reproduce the issue seen in comment 7? Or does it just immediately start happening when you enable WR? Does it also seem to happen when chrome is running?

Comment 10

[Jeff Muizelaar [:jrmuizel]]

Magnus, do you still see this?

Comment 11

[Glenn Watson [:gw]]

Closing as no response.