1807627 - Serious screen flickering on multimonitor with different refresh rates

Status: RESOLVED DUPLICATE of bug 1638709

(Core :: Graphics, defect, P3)

Description

[Gian-Carlo Pascutto [:gcp]]

Attachment: glitching.mkv

Nightly - but this has been here for a while - Windows 10, RTX 2060 plus latest NVIDIA drivers, dualscreen setup with 1440p@165Hz on one monitor (DP) and 1080p60 (HDMI) on another.

One window with
https://tcec-chess.com/
on the 1080p

Other window with just the homepage on the 1440p.

The 1440p screen flickers badly and often shows textures from the current contents on the 1080p screen. (See attached video)

This reproduced earlier with an older NVIDIA card, it's not a recent regression. I was quietly hoping it was driver/card related, but the RTX2060 is fairly new...

Comment 1

[Gian-Carlo Pascutto [:gcp]]

This does not happen when the Firefox window on the 1080p screen is closed. So the flicker is specific to having 2 windows open on 2 different monitors (with different refresh frequencies).

Comment 2

[Gregory Pappas [:gregp]]

Attachment: glitching.mp4

Comment 3

[Gregory Pappas [:gregp]]

(Firefox doesn't support mkv contained video so I reattached in a different container)

This is likely a dupe of bug 1638709. Does setting gfx.webrender.compositor to false in about:config change anything?

Comment 4

[Sotaro Ikeda [:sotaro]]

:gcp, can you attach about:support to this bug? Thank you.

Comment 5

[Gian-Carlo Pascutto [:gcp]]

Attachment: about:support

Comment 6

[Gian-Carlo Pascutto [:gcp]]

This is likely a dupe of bug 1638709. Does setting gfx.webrender.compositor to false in about:config change anything?

Trying this now. As a note, flipping this causes about:support to still show "Compositing WebRender" despite a restart.