1714052 - rendering artefacts on every pages on osx 10.15 on 4k display

Status: UNCONFIRMED

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

Description

[alexandre.assouad]

Attachment: Image 2.GIF

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

I'm using ff88 osx 10.15.7, I'm using a dual screen setup with a 4k screen and my laptop retina screen.
I'm scrolling on any pages

Actual results:

Multiple graphic artefacts (blue /red lines / black boxes) are shown that lead my screen to get disabled for 2 seconds.

It does happens less if firefox windows surface is smaller

Expected results:

No artefacts

Comment 1

[alexandre.assouad]

Attachment: IMG_4180.MOV

Video with better quality

Comment 2

[alexandre.assouad]

Dear Firefox team,
I noticed that the animation were sluggish on my main screen so I disconnected and reconnected my screen, animations were smooth again and artefacts have disappeared on firefox.

Although other windows were sluggish, firefox was the only one showing artifacts.

I'll try to reproduce the bug but I suspect it's related to integrated or decrete gpu, or maybe gpu status after resume suspend state.
I'm going to monitor things on my side and as soon as I have mor information I'll update the report.

Thanks

Comment 3

[alexandre.assouad]

Attachment: IMG_4185.mp4

Comment 4

[alexandre.assouad]

Dear firefox team,

This issue seems to be related to deep sleep. Indeed, the issue happened again this morning, my computer was in deep sleep, I woke it up then went to firefox and the artefacts were happening again.

Noticeably a youtube windows did not seemed to be affected by the artefacts (cf video IMG_4185)

I unplugged and plugged my external monitor then the artefacts went away.

Thanks

Comment 5

[Miko Mynttinen]

Thank you for the report. Could you please attach your about:support so that we get a bit more information about your setup.

Instructions:

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 like Notepad, and save the file.
4. Click the Attach New File button above the description here to upload the file.

Can you repeat this issue reliably, does it happen every time your computer wakes up from the sleep mode? Does it matter which website is open in the browser?

Comment 6

[alexandre.assouad]

Attachment: about:config

Comment 7

[alexandre.assouad]

Dear Miko,
I'm not sure yet I can repeat the issue, I'll try to do so in the next days but I'm confident it only happens after my computer wakes up from the sleep mode.

The artefacts are only happening when scrolling a web page and it does not matter which website is open. The only exception I saw seems to be youtube but I think youtube scroll is a scroll inside a div or containter.
I went to other website where I can scroll inside a div and it does not trigger any artefacts.