1563628 - Font rendering blurry with hardware acceleration until you click text

Status: UNCONFIRMED

(Core :: Graphics: Text, defect, P3)

Description

[lepardigepardi]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

Steps to reproduce:

1. 1440p resolution monitor with nVidia graphics card
2. Go to https://bbs.io-tech.fi/ forum
3. Browse

Actual results:

Occasionally text rendering breaks until you click on the text (can take several days of browsing to notice), fonts will be slightly blurry.

Imgur picture link of a word before and after click:
https://imgur.com/a/bdvpyko

Expected results:

Text shouldn't have randomly went blurry while browsing.

Comment 1

[Rares Doghi, Desktop QA]

Hi lepardigepardi, I tried to reproduce this issue but without any success.
Does this issue occur with hardware acceleration OFF?
In about:support for the Composition does it say Webrender ? if so can you please Turn Webrender Off from about:config by setting the following preferences to false and retest it:

gfx.webrender.all = false
gfx.webrender.all.qualified = false

In the mean time I'll set the component for this issue and maybe our devs will know more about this issue.

Comment 2

[lepardigepardi]

Hi, issue doesn't happen with hardware acceleration OFF. However there are horizontal stripes in YouTube videos after disabling it, so it's a bad fix.

I couldn't find "gfx.webrender.all.qualified". "gfx.webrender.all" was already set to false.

Comment 3

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

The priority flag is not set for this bug.
:lsalzman, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[MarjaE]

Also affects MacOS with 1080p monitors. It makes it painful and sometimes impossible to try to read small and/or faint text in about:preferences and about:config.

Possible duplicate of bug 635490, Thunderbird bug 1689845, etc.