Open Bug 1950066 Opened 2 days ago Updated 1 days ago

Variable refresh rate maxed out with wayland webrender compositor enabled

Categories

(Core :: Graphics: WebRender, defect)

Product:
Core
Component:
Graphics: WebRender
Version:
Firefox 137
Platform:
x86_64
Linux
Type:
defect

Tracking

()

Status:
UNCONFIRMED

People

(Reporter: greyxor, Unassigned, NeedInfo)

References

(Blocks 1 open bug, Regression)

Details

(Keywords: regression)

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Steps to reproduce:

Enable gfx.webrender.compositor.force-enabled
Idle on firefox, doing nothing
Run vbltest in a terminal to check if vrr (variable refresh rate) is working as expected

Actual results:

There a regression with VRR with compositor.force-enabled VRR is not working anymore.

I'm using vbltest to check the actual real refresh rate of my output.

Doing nothing: 32Hz
Open nautilus and doing nothing: 32Hz
Moving mouse anywhere: 60Hz
Open firefox: 60Hz
doing nothing in firefox: 60Hz
open firefox (without compositor.fore-enabled): 32Hz

If I disable compositor.force-enabled then vrr is working as expected again

Expected results:

doing nothing in firefox should set my display refresh at minimal frequency (~30Hz)

Blocks: hdr-video-linux
Keywords: regression
OS: Unspecified → Linux
Regressed by: 1938033
Hardware: Unspecified → x86_64
OS: Linux → Unspecified
Hardware: x86_64 → Unspecified
OS: Unspecified → Linux
Hardware: Unspecified → x86_64

:stransky, since you are the author of the regressor, bug 1938033, could you take a look?

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Flags: needinfo?(stransky)
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