1678297 - Garbled rendering on OSX

Status: RESOLVED DUPLICATE of bug 1678388

(Core :: Graphics, defect)

Description

[johshoff]

Attachment: Screen Shot 2020-11-19 at 13.34.57.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:83.0) Gecko/20100101 Firefox/83.0

Steps to reproduce:

1. Navigate to a webpage (can be anything)
2. Open new tab, navigate to another webpage
3. Go back to tab in #1

---

This is on my old-school laptop running OSX High Sierra 10.13.6 (17G14042):
Model Name: MacBook Air
Model Identifier: MacBookAir4,2
Processor Name: Intel Core i7
Processor Speed: 1.8 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 4 GB
Boot ROM Version: 135.0.0.0.0
SMC Version (system): 1.73f66

Actual results:

The rendering of the page was completely garbled (see attachment).

NOTE that this doesn't happen consistently, but has happened multiple times since I updated Firefox to 83.0.

Expected results:

The page should look like it did in #1

Comment 1

[johshoff]

The areas that look fine in the screenshot are where I moved my mouse. In other words, it's fine when repainting.

Comment 2

[johshoff]

Also, note that even the UI is garbled. You can't see the whole URL.

Comment 3

[Joan]

Attachment: Screen Shot gmail.png

Comment 4

[Joan]

Attachment: Screen Shot mahjong.png

Comment 5

[Joan]

Model Name: MacBook Air
Model Identifier: MacBookAir4,2
Processor Name: Intel Core i5
Processor Speed: 1.7 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Boot ROM Version: 135.0.0.0.0
SMC Version (system): 1.73f66

System Version: macOS 10.13.6 (17G66)
Kernel Version: Darwin 17.7.0

As johshoff describes, I am experiencing garbled rendering on web pages; however, it displays garbled on initial navigation to page. It happens inconsistently, except for gmail and mahjong (at https://www.by-art.com/mjong/mjong.html). Screenshots attached. When I click on areas of the screen, information does display correctly and eventually the whole page will display properly. I am also on a MacBook Air (i5 processor) and running OSX High Sierra (10.13.6). Problems began when I upgraded Firefox to version 83.

Are there any log files I should attach to this bug report, and if so, where would I find them?

Thank you for your help!

Comment 6

[Andrew Osmond [:aosmond] (he/him)]

We have added a blocklist rule as WR is broken with that hardware on OSX.

Comment 7

[Jeff Muizelaar [:jrmuizel]]

johshoff, are you still seeing this problem?

Comment 8

[johshoff]

Nope, it seems like the blocklist rule fixed the issue. Thanks!