1625882 - Firefox does not synchronously update its surface on resize

Status: RESOLVED DUPLICATE of bug 1608617

(Core :: Widget: Gtk, defect)

Description

[bjoern.daase]

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:74.0) Gecko/20100101 Firefox/74.0

Steps to reproduce:

This was raised in https://gitlab.gnome.org/GNOME/mutter/-/issues/977#note_752470 and Robert said, there is no Firefox bug yet. So here you go.

It affects (at least) Firefox 74 in combination with mutter 3.36:
You always get a one frame glitch occasionally visible when using tiling (super+up|down|left|right) or when unfullscreening a video. This has most likely to do with Firefox not synchronously updating it surface on resize (original problem is here: https://bugzilla.mozilla.org/show_bug.cgi?id=1609538#c7).

Actual results:

A one frame glitch where Firefox is rendered fullscreen when it should be windowed.

Expected results:

No glitches.

Comment 1

[Andrei Purice]

Hello,

Does this issue occur when using Safe Mode? You can find helpful info here : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode .
Also a fresh new profile could help. You can find more about creating a new profile here : https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems#w_6-create-a-new-firefox-profile .
If possible, you can test this issue on the nightly build as well. Download the build from : https://www.mozilla.org/en-US/firefox/nightly/all/

Comment 2

[bjoern.daase]

(In reply to Andrei Purice from comment #1)

Hello,

Does this issue occur when using Safe Mode? You can find helpful info here : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode .
Yes, also happens in safe mode.
Also a fresh new profile could help. You can find more about creating a new profile here : https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems#w_6-create-a-new-firefox-profile .
Yes, also happens with a fresh profile on a new machine.
If possible, you can test this issue on the nightly build as well. Download the build from : https://www.mozilla.org/en-US/firefox/nightly/all/
Yes, also happens in firefox-nightly.

Comment 3

[Andrei Purice]

Adding a component for this enhancement in order to get the dev team involved.
If you feel like it's not the correct one please feel free to assign it an appropriate one.

Comment 4

[Robert Mader [:rmader]]

Please use Widget Gtk and make it block bug 635134 - that should get Martin involved.

Comment 5

[Martin Stránský [:stransky] (ni? me)]

Can you create a screencast (video) of the issue?
Thanks.

Comment 6

[bjoern.daase]

Attachment: Screencast from 30.04.2020 21:36:09.webm

Comment 7

[bjoern.daase]

There you go. It is a bit hard to see because it is only one frame (especially the glitch when resizing) but the (un-)fullscreen glitch is actually quite visible in the screencast.

Comment 8

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is -- (Backlog,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 9

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is -- (Backlog,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 10

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is -- (Backlog,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 11

[Firefox Bug Husbandry Bot]

The severity of these bugs was changed, mistakenly, from normal to S3.

Because these bugs have a priority of --, indicating that they have not been previously triaged, these bugs should be changed to Severity of --.

Comment 12

[Robert Mader [:rmader]]

This is actually a duplicate of bug 1608617