1633802 - Graphical error/flickering when scrolling on ubuntu 18.04 (OpenGL=affected, WebRender=unaffected)

Status: RESOLVED WONTFIX

(Core :: Graphics, defect)

Description

[julian]

Attachment: Graphical errors when scrolling

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0

Steps to reproduce:

Sometimes (fortunately?) when scrolling a website up and down. It is not website specific. The website in the video is heise.de.

Actual results:

Graphical errors/flicking are appearing. The patterns and size of it are always different, but somewhat consistent in one session. Usually restarting Firefox solves the issue. Please see the attached video.

Expected results:

No graphical errors.

Comment 1

[Emma Humphries ☕️🎸🧞‍♀️✨ (she/they) [:emceeaich] (Pacific Time) use needinfo]

Clarifying question: Wayland or X11?

Comment 2

[Darkspirit]

Please open about:support, click on "Copy text to clipboard" and paste it here.

Comment 3

[Martin Stránský [:stransky] (ni? me)]

Do you use any display scale?

Comment 4

[j.wagenschuetz]

Attachment: about:support

Comment 5

[j.wagenschuetz]

Thanks for the quick replies! I'm not using any display scale.

Comment 6

[Darkspirit]

Please open about:config, set layers.acceleration.force-enabled (the deprecated OpenGL compositor) to false and gfx.webrender.all (the new OpenGL compositor) to true and restart Firefox. WebRender is active if you see "Compositing: WebRender" on about:support. Does WebRender fix this problem?

Comment 7

[j.wagenschuetz]

Thanks for the help. I change it, but it will take a few days for me confirm, if anything has changed, since the bug only shows up sporadically.

Comment 8

[j.wagenschuetz]

The graphical didn't show up again. You can close the bug. Thank you very much and keep up the great work! :)

Comment 9

[Darkspirit]

Thanks for the confirmation! :)