1420956 - Text on Bugzilla is distorted with WebRender enabled

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P1)

Description

[Pascal Chevrel:pascalc]

Attachment: Distorted text in Bugzilla with Webrender

Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0 ID:20171127100433

I activated webrender with the instructions from https://mozillagfx.wordpress.com/2017/11/27/webrender-newsletter-10/ :
In about:config:
– set “gfx.webrender.enabled” to true,
– set “gfx.webrender.blob-images” to true,
– set “image.mem.shared” to true,
– if you are on Linux, set “layers.acceleration.force-enabled” to true.

After a restart of the browser, the text in Bugzilla is all distorted (see attached file).

If I take a screenshot of the bug with the built-in screenshot tool in Firefox, the image saved has no text rendering issue (the screenshot attached is from the OS screenshot tool).

If I put the options above back tpo false and restart the browser, the bug is gone.

My computer is an X1 Carbon 4th gen with an Intel GPU, I run Ubuntu 17.10. I will attach the data from about:support

Comment 1

[Pascal Chevrel:pascalc]

Attachment: aboutsupport.json

Comment 2

[Darkspirit]

from comment 1
> font.default.x-unicode	"sans-serif"
> font.minimum-size.x-western	11
> font.name.serif.x-western	"Ubuntu"
> font.name.monospace.x-western	"Ubuntu Mono"
> font.internaluseonly.changed	true
> font.name.sans-serif.x-western	"Ubuntu"

> "Intel Open Source Technology Center -- Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) "

Comment 3

[Lee Salzman [:lsalzman]]

Fixed by upstream WR PR https://github.com/servo/webrender/pull/2165