1755119 - Firefox window corner glitch on Windows 11 Insider Dev Preview

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[rom4uk]

Attachment: Screenshot 2022-02-12 114817.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:97.0) Gecko/20100101 Firefox/97.0

Steps to reproduce:

Just launching Firefox as usual

Actual results:

White pixels on the window corners, which clearly should not be

Expected results:

Comment 1

[rom4uk]

This bug only on Windows 11 and only with this application.

Comment 2

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

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

Comment 3

[Jamie Nicol [:jnicol]]

Hi @rom4uk, thank you for the bug report.

Could you please navigate to about:support, click "copy text to clipboard", and attach the contents to this bug?

Do you know if this used to work correctly, or has it always been an issue (as far back as you used firefox/windows 11)?

Sotaro, do you have a windows 11 device?

Comment 4

[rom4uk]

Attachment: 477

Comment 5

[Jamie Nicol [:jnicol]]

Thanks! Could you also try setting gfx.webrender.compositor to false in about:config, restart firefox, and see if that helps?

Comment 6

[rom4uk]

Nothing has changed :(

Comment 7

[Sotaro Ikeda [:sotaro]]

(In reply to Jamie Nicol [:jnicol] from comment #3)

Sotaro, do you have a windows 11 device?

Yes, I have 3 windows11 devices. But I could not reproduce the problem.

Comment 8

[rom4uk]

Sotaro, you need Windows 11 Insider Dev Preview Build, to reproduce this.

Comment 9

[Sotaro Ikeda [:sotaro]]

(In reply to rom4uk from comment #8)

Sotaro, you need Windows 11 Insider Dev Preview Build, to reproduce this.

Thanks, I confirmed that the Windows 11 Insider Dev Preview Build could reproduce the problem on my laptop.
Before updating to the Insider Dev Preview Build the problem did not happen on the laptop.

Comment 10

[Jamie Nicol [:jnicol]]

Have seen a few reports of this on Reddit too

Comment 11

[Sotaro Ikeda [:sotaro]]

posted to feedback Hub.
https://aka.ms/AAfyc5l

Comment 12

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #9)

Thanks, I confirmed that the Windows 11 Insider Dev Preview Build could reproduce the problem on my laptop.
Before updating to the Insider Dev Preview Build the problem did not happen on the laptop.

When pref gfx.webrender.compositor = false, the problem did not happen.
In this case, SwapChain + DirectComposition was used for rendering. By default, DirectComposition + VirtualSurface is used.

Comment 13

[Kelsey Gilbert [:jgilbert]]

I emailed our microsoft contact list about this.

Comment 14

[Bob Hood [:bhood]]

Jeff will reach out "[e-mail]" to see if we can get some movement on this.

Comment 15

[Bob Hood [:bhood]]

Attachment: vmware_2022-03-24_17-12-27.png

At Microsoft's suggestion, ran the current release version of Firefox (98.0.2) using default settings, in a virtual machine running Windows 11 on the Developer Preview channel (version 22H2, OS build 22581.1). Launching Firefox within this environment produced expected results wrt the window corners. I've attached a screen grab of what I'm seeing in this environment and configuration.

Comment 16

[Bob Hood [:bhood]]

Attachment: vmware_2022-03-24_17-21-37.png

I shut down the VM, disabled hardware acceleration, and then ran it all again. The attached screenshot shows the result using only software rendering.

I cannot confirm this report using current software.

Comment 17

[Bob Hood [:bhood]]

Microsoft has confirmed that this is a bug and think they have fixed it internally, and it should manifest in an upcoming DevPreview release. Closing this report.