1278499 - I experience rendering issues with FF Developer edition

Status: UNCONFIRMED

(Core :: Graphics, defect, P3)

Description

[michael.star.mail]

What did you do?
================
1. Open a page
2. Open another window (hardware accelerated WPF) that overlap Firefox window
3. Minimize that window and see rendering artifacts.

What happened?
==============
The page was rendered with artifacts (black areas)

What should have happened?
==========================
The page had to be rendered normally

Is there anything else we should know?
======================================
I'm on the alpha channel but I experience this bug several versions already. 
I have a switchable graphics (Nvidia and Intel).
I have a screenshots.
OS is Windows 10 Pro

Comment 1

[michael.star.mail]

Attachment: firefox bug.png

The areas in red is my edits (removed personal info)

Comment 2

[Jamie Nicol [:jnicol]]

Thank you for the report. Does this still occur if you disable acceleration in firefox?

Although you have experienced this for a few releases, as it may still be a regression would you be able to run mozregression to find the regression range? https://mozilla.github.io/mozregression/

Comment 3

[Matthew]

I too experience this on two separate computers (one with switchable graphics, one without). Disabling hardware acceleration does not seem to fix the problem for me. 

Things of note:
- It can go for long periods without occuring
- When it does occur, it is often on a page load
- Mouse movement, page scrolling, tab switching, etc can make it appear/disappear

Windows 10 x64
GTX 980Ti (Computer 1) and GTX 960M + HD530 (Computer 2)

Comment 4

[Matthew]

Attachment: rendering bug firefox

Another example image of the bug occurring.

Comment 5

[michael.star.mail]

The bug doesn't reproduce after I have switched off hardware acceleration.