1689532 - Screen glitches after tab crash

Status: RESOLVED INCOMPLETE

(Core :: Graphics: WebRender, defect)

Description

[me]

Attachment: firefox_glitch.jpeg

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:85.0) Gecko/20100101 Firefox/85.0

Steps to reproduce:

After a tab crash I restarter firefox and now some glitches appear on screen as you see on attachments. Random black squares or white squares with a diagonal. I tried removing firefox and installing again, and rebooting the computer.

Ubuntu 20.04 and Firefox 85.0

The glitches don't appear in screen capture so I had to take a picture

Actual results:

glitches

Expected results:

no glitches

Comment 1

[me]

Attachment: glitches.jpeg

more glitches

Comment 2

[me]

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Comment 3

[Dzmitry Malyshau [:kvark]]

Could you please attach the about:support to the issue instead of dropping it in a comment?

It's weird that FF was restarted and only then showed the issue.
Are there any crashes under about:crashes? I'd be interested to know what crashed there, and if it's related to our GPU process.
Marking as S3 in the meantime, need more info here.

Note that the GPU here is "Mesa Intel(R) Xe Graphics (TGL GT2)". It would be nice to get some testing on it.

Comment 4

[me]

Attachment: ffff

Comment 5

[me]

Nothing on about:crashes

Set gfx.webrender.force-disabled to true in about:config and restart Firefox.

worked

But would be nice to have a proper solution

Comment 6

[Dzmitry Malyshau [:kvark]]

Thank you!
Adding to triage queue to see if we have anybody that could repro.

Comment 7

[Dzmitry Malyshau [:kvark]]

You have a new GPU, and I see that the Mesa version was released in June last year.
Could you try updating the driver (i.e. the mesa packages) to a newer version and seeing if the issue is still there?