1721855 - Firefox 90.0.2 window resizes cause rendering errors

Status: VERIFIED INVALID

(Core :: Widget: Gtk, defect)

Description

[Frank Tobin]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:90.0) Gecko/20100101 Firefox/90.0

Steps to reproduce:

1. Start Firefox 90.0.2 with a new profile (using Ubuntu 18)
2. Go to any webpage.
3. Resize the window, larger and smaller.

Actual results:

Page and Chrome do not re-render

Expected results:

Page and chrome re-render

Comment 1

[Frank Tobin]

Note: this change happened instantly on upgrading from 90.0.1 to 90.0.2.

Comment 2

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

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[Darkspirit]

Thanks for the report! Please open about:support, click on "copy text to clipboard" and paste it here. Please also attach a screenshot or screencast. Thanks!

Comment 4

[Frank Tobin]

Attachment: about:support

Comment 5

[Frank Tobin]

Attachment: screenshot of rendering issues

This is an unedited firefox Window. The black is from firefox, not me.

Comment 6

[Frank Tobin]

Attachment: screenshot of about:support

This is an unedited entire firefox Window. You're seeing multiple layers from other windows. The black is from Firefox, not me.

Comment 7

[Darkspirit]

1. Does this bug still occur with https://nightly.mozilla.org?
2. Dot release changes mostly come directly from Nightly to fix an important bug in Beta and Release.
   Are you able to find a regression range? (At the end you should get a pushlog url.)
   $ pip3 install mozregression
$ mozregression --good 2021-07-01 --bad 2021-07-22
$ mozregression --good 89 --bad 90.0.2

Comment 8

[Frank Tobin]

Logging out of my X session and back in resolved the issue.