1814829 - Black boxes appears randomly and it disappear when mouse is moved upon it

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect, P3)

Description

[Zeron]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/109.0
Firefox for Android

Steps to reproduce:

black rectangular box appears randomly in Firefox setting and also in address bar but disappears when mouse is moved upon it

Actual results:

When I am browsing the internet, a black rectangular appears at random, mostly when I am watching videos.
When zooming in and out, the black box appears frequently.
Most importantly, it is also visible in Firefox settings.
It appears in the address bar and randomly appears when loading YouTube videos and scrolling through YouTube videos.
When I move my mouse over the black box, it disappears.

Expected results:

https://pastebin.com/5hHEp6gK

Comment 1

[Zeron]

Attachment: Untitled.mp4

Comment 2

[Zeron]

Attachment: Untitled(1).mp4

Comment 3

[Zeron]

Attachment: Untitled(2).mp4

screen flashes

Comment 4

[BugBot [:suhaib / :marco]]

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

Comment 5

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

Looks like a bug while VA-API video playback. Can you try to disable VA-API? see
https://fedoraproject.org/wiki/Firefox_Hardware_acceleration#Video_decoding
and set media.hardware-video-decoding.enabled to false at about:support.

Comment 6

[Zeron]

After I disabled VA-API, the black rectangle box that appeared at random seemed to disappear, but it still appears when I scroll across Reddit and it didn't resolve the flickering problem.

Comment 7

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

Can you try to disable HW acceleration? At about:config set gfx.webrender.software to false and restart browser.
Thanks.

Comment 8

[Zeron]

By default, gfx.webrender.software is false, and if I stop hardware acceleration, practically all of the issues are resolved, but Firefox returns to its previous state of being extremely sluggish and the CPU starts to go brr....

Thank you for responding; I hope somday it will get fixed...

Comment 9

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

That looks like gfx drivers bug.
Please report that at https://gitlab.freedesktop.org/mesa/mesa/-/issues and attach about about your distro/ffx card there (the one from https://pastebin.com/5hHEp6gK).
Thanks.