1627452 - All Bookmarks window contents transparent after maximize and restore

Status: RESOLVED DUPLICATE of bug 1502519

(Core :: Graphics: WebRender, defect)

Description

[B.J. Herbison]

Attachment: IMG_20200404_112546_MP.jpg

Steps to reproduce:

1. Create a new profile for Nightly.
2. Open a library window: All Bookmarks, All History, or All Downloads.
3. Maximize the pop-up window.
4. Restore the pop-up window.

Expected:
The result after step 4 is the same as after step 2.

Actual:
The frame of the pop-up window is visible but the contents are transparent. See the attachment. Mousing over the window will cause the contents to be displayed.

Using Nightly on Ubuntu running XFCE. Seen with Nightly 76.0a1. Unable to reproduce with Firefox 74.

Comment 1

[Mark Banner (:standard8)]

Would you be willing to try and get a regression range for this?

Comment 2

[Mark Banner (:standard8)]

(https://mozilla.github.io/mozregression/)

Comment 3

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

Bugbug thinks this bug is a regression, but please revert this change in case of error.

Comment 4

[B.J. Herbison]

The regression range is:
15:56.38 INFO: Last good revision: c59a8b50305b960e027e5dc83c04d3f8a95b68ff
15:56.38 INFO: First bad revision: a14cf357555a477bc2fcfbe746a3d9d33ffee171
15:56.38 INFO: Pushlog:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c59a8b50305b960e027e5dc83c04d3f8a95b68ff&tochange=a14cf357555a477bc2fcfbe746a3d9d33ffee171

The only bug in the push is bug 1547702 with a subject of "Allow WebRender on more Intel devices". That doesn't really identify the underlying change that cause the issue. Is it possible and useful to force WebRender on when mozregression is run?

Comment 5

[Darkspirit]

Mousing over the window will cause the contents to be displayed.

Thanks, this bug is known and only present with OpenGL/WebRender on X11 with KDE and XFCE.

Comment 6

[Darkspirit]

On Linux, WebRender is currently only enabled in Nightly. (It can also be force-enabled with gfx.webrender.all.)