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Issue metadata

Status: WontFix
Owner: ----
Closed: Sep 2016
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug



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Rectangles with slightly different color appear on background

Reported by jonas.dr...@gmail.com, Aug 24 2016

Issue description

UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Example URL:
https://get.blog/

Steps to reproduce the problem:
1. On Chrome, open up one of the following websites (will add more when I find more): https://get.blog/ https://www.voorhoede.nl/en/

What is the expected behavior?
No rectangles, static color

What went wrong?
Rectangles are drawn that are about the same color as the background.
For example on voorhoede I can see a rectangle on the right that is #EDDD3E instead of #ECE328.
In both examples, the background color is set with CSS. voorhoede uses background-color while get.blog uses background

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes I experience this issue for +/- 1 month

Does this work in other browsers? Yes 

Chrome version: 52.0.2743.116  Channel: stable
OS Version: OS X 10.12.0
Flash Version: Shockwave Flash 22.0 r0

I tested it with all my usual plugins enabled, all plugins disabled and in incognito. Same results each time.
On safari and firefox the site is rendered properly.

I also attached six screenshots. Three per site. 
On get.blog, you can see a rectangle on the left-middle, one on the right-middle and one on the right-bottom but left from the right-middle one.
On voorhoede there is one on the right middle. 10 minutes from now there also was one on the left but it magically disappeared.
To see them you might want to use a monitor with high contrast. I use a MacBook Air 2015 13' and barely see it.
 
Screen Shot 2016-08-24 at 14.19.34.png
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Screen Shot 2016-08-24 at 14.19.44.png
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Screen Shot 2016-08-24 at 14.19.24.png
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Screen Shot 2016-08-24 at 14.21.01.png
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Screen Shot 2016-08-24 at 14.21.12.png
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Screen Shot 2016-08-24 at 13.42.23.png
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Extreme example:
https://pusher.com/push-notifications

Scroll down to the 4th section of the page. When scrolling slowly (grabbing the scrollbar instead of scroll wheel) you can see how the rectangles appear when entering the 4th section


Didn't attached incognito screenshot as it shows the same as normal chrome
Screen Shot 2016-08-24 at 14.42.12.png
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Screen Shot 2016-08-24 at 14.42.37.png
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https://plus.google.com/+JonasDplus/posts/4WvTRobwgwP
My post regarding the issue
Components: -Blink Internals>GPU>Rasterization
Is this paint or rastering issue? Tentatively tossing to Rasterization bucket.
Can't seem to reproduce this. Also for the screenshots in your original bug report, it's not clear to me what the issue is. Can you mark the regions, which are not painted correctly.
Labels: Needs-Feedback
As I'm on vacation, I can not access my machine and edit the images properly. I will come back at this in about 1 and a half week.

Indeed, I could not reproduce the issue on other machines but the issue also accrued after I uninstalled chrome completely and installed it again. Wether plugins are installed or not.
Project Member

Comment 7 by sheriffbot@chromium.org, Sep 4 2016

Labels: -Needs-Feedback Needs-Review
Owner: karandeepb@chromium.org
Thank you for providing more feedback. Adding requester "karandeepb@chromium.org" for another review and adding "Needs-Review" label for tracking.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
Owner: ----
Over to Mac Triage, in case anyone can reproduce this.
After updating macOS and Chrome this issue does not occur anymore. I can't reproduce it anymore.
Status: WontFix (was: Unconfirmed)
I cannot reproduce this either with current stable. In light of #9, I'm going to call this WontFix.
Hi,

I have the exact same issue. Even after a clean chrome install.
MacBook Pro (Retina, 15-inch, Mid 2014)
macOS 10.12 (16A323)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

https://jsfiddle.net/r5XJM/7/


screenshot 7.png
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NVIDIA GeForce GT 750M 2048 MB
Intel Iris Pro 1536 MB

Disabling Accelerated 2D canvas, fix the problem.
I can agree, the issue does indeed still appear. Last time I saw it was on http://bulma.io

Disabling Accelerated 2D canvas (chrome://flags/#disable-accelerated-2d-canvas) did not help either.

The attached screenshot is from bulma.
Bildschirmfoto 2016-10-06 um 19.13.08.png
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