1726357 - Firefox UI temporarily freezes from time to time with webrender on

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[spastorino]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0

Steps to reproduce:

I'm not sure what's the condition that causes it to start to work very slowly and freeze until I quit Firefox and restart it again.

I've set gfx.webrender.all to true.

I've also seen this report https://bugzilla.mozilla.org/show_bug.cgi?id=1717239 maybe my problem is related but I'm not sure because for me it started to show up on Firefox 91 and not before and it doesn't hang/lock, it's just extremely slow.

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

[Jim Mathies [:jimm]]

Could you please post your about support text?

Comment 3

[spastorino]

Attachment: about_support.txt

Comment 4

[Robert Mader [:rmader]]

Here it would also be interesting if the same happens with widget.wayland.vsync.enabled disabled. FTR., gfx.webrender.all should not be needed any more.

Comment 5

[spastorino]

Yes, so I've disabled gfx.webrender.all and have widget.wayland.vsync.enabled enabled. Trying this settings out and will report back if I see the issue.

Comment 6

[Darkspirit]

(In reply to spastorino from comment #5)

Yes, so I've disabled gfx.webrender.all and have widget.wayland.vsync.enabled enabled. Trying this settings out and will report back if I see the issue.

gfx.webrender.all (force-enabling webrender) does not matter anymore because it's enabled by default (bug 1701977).
Please disable widget.wayland.vsync.enabled and restart Firefox.

Comment 7

[spastorino]

Forgot to comment here but disabling widget.wayland.vsync.enabled fixes the issue.

Comment 8

[Timothy Nikkel (:tnikkel)]

Maybe a profile using https://profiler.firefox.com/ when the freezes happen would be useful?

Comment 9

[spastorino]

This is not a problem for me anymore.

Comment 10

[Bob Hood [:bhood]]

Thank you for letting us know! Closing as resolved.