1246583 - WebVR produces flickering in fullscreen mode

Status: RESOLVED DUPLICATE of bug 1247082

(Core :: Web Painting, defect)

Description

[iprotsyuk]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.103 Safari/537.36

Steps to reproduce:

1. Connect Occulus Rift to a PC
2. Run Nightly
3. Open any web-site with a WebVR demo, for example http://cabbi.bo/RainbowMembrane/
4. Double-click at the main canvas to enter VR mode


Actual results:

VR scene is rendered at the Rift display, but it's flickering.

My guess is that it can be caused by latest Nightly updates because the Rift doesn't show any flickering when other programs use it.


Expected results:

VR scene is rendered without visible flickering.

Comment 1

[iprotsyuk]

Something went wrong after the upgrade to 47 version indeed. I've just installed the latest 46 branch build (46.0a1, 2016-01-25), and it produces no flickering when rendering.

Comment 2

[Loic]

Is it testable without having Occulus Rift? (I guess not)

Comment 3

[iprotsyuk]

(In reply to Loic from comment #2)
> Is it testable without having Occulus Rift? (I guess not)

Yep, it isn't. Everything is ok on the screen. The problem appears only when I enable rendering on Oculus. I'm not sure if it's reproducible with other VR devices. For the record, I'm using Oculus Rift DK2 and Oculus runtime version 0.8.

Comment 4

[Loic]

Ok, so as you have the device to test and reproduce the issue, could you install the tool Mozregression to find a regression range in FF47.
See http://forums.mozillazine.org/ for details. You need to install python 2.7 to run this packgage.
After that, paste here the final pushlog provided in the console output.

Comment 5

[Loic]

Sorry, wrong copypasta, the link is http://mozilla.github.io/mozregression/

Comment 6

[iprotsyuk]

(In reply to Loic from comment #5)
> Sorry, wrong copypasta, the link is http://mozilla.github.io/mozregression/

This is what mozregression showed at the end:

Looks like the following bug has the changes which introduced the regression:
https://bugzilla.mozilla.org/show_bug.cgi?id=1064843

Can send a whole log if needed.

Comment 7

[iprotsyuk]

Attachment: mozregression_output.txt

mozregression output

Comment 8

[Loic]

Ty for the reg range.

Comment 9

[Xidorn Quan [:xidorn] UTC+10]

A fix has been landed in bug 1247082 so mark this duplicate.

Comment 10

[Loic]

Flags removed because of duped.