1705695 - [LINUX] Rendering at 60Hz despite the monitor refresh rate set to 144Hz when using MOZ_X11_EGL=1 (layout.frame_rate fixes it)

Status: RESOLVED DUPLICATE of bug 1640779

(Core :: Graphics, defect)

Description

[Artem S. Tashkinov]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0

Steps to reproduce:

I have a monitor which has a 144Hz refresh rate which is confirmed by xrandr/glxgears output in Linux/Fedora 33 with proprietary NVIDIA drivers 465.24.02 under X.org/XFCE (no compositing).

However both www.testufo.com/refreshrate and www.vsynctester.com report 60Hz.

I've found a workaround which is to set layout.frame_rate to 144 but I hate to do it manually because most users never touch about:config and this is not required under Windows.

Setting layers.acceleration.force-enabled to true and gfx.webrender.all to true makes no difference.

I'm using the official Firefox build, version 87 ( https://ftp.mozilla.org/pub/firefox/releases/87.0/linux-x86_64/ )

Comment 1

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

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

Comment 2

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

The component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit auto_nag documentation.

Comment 3

[Artem S. Tashkinov]

New findings:

When using MOZ_X11_EGL=1 Firefox defaults to 60Hz.

When not using this, Firefox defaults to the actual monitor refresh rate.

Comment 4

[Artem S. Tashkinov]

Bug 1720634 could be related, I've no idea.

Comment 5

[Robert Mader [:rmader]]

This should have been fixed by bug 1640779 in FF 95 - please reopen if that's not the case.