1580827 - Videos are freezing until you move the mouse over the player

Status: VERIFIED FIXED

(Core :: Graphics: WebRender, defect, P1)

Description

[tgn-ff]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0

Steps to reproduce:

I don't have a better title.

1. Visit a video on yt.
2. Move the mouse away from the player until the video controls disappear.
3. Move the mouse over the player again.

Actual results:

At step (2) the video froze while the audio continued playing. At step (3) the video started to play again.

Expected results:

Bisection points to three bug, but it seems obvious that the culprit is Bug 1580063.

mozregression log:
7:49.28 INFO: Last good revision: 47f5993a8467ea4a801f9ea6abb8a81309a7577e
7:49.28 INFO: First bad revision: 0879b99736d84ff99ebc013fa30dabe1da067b36
7:49.28 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=47f5993a8467ea4a801f9ea6abb8a81309a7577e&tochange=0879b99736d84ff99ebc013fa30dabe1da067b36

Comment 1

[Glenn Watson [:gw]]

I'm investigating this now.

Comment 2

[Glenn Watson [:gw]]

Attachment: Bug 1580827 - Fix video stuttering / freezing with WR dirty rects.

Comment 3

[Glenn Watson [:gw]]

Pending try:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=3fa173c0e7dba563edf2e9ff966d3b03d3b69bbe

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ab9df6cf0f4f
Fix video stuttering / freezing with WR dirty rects. r=kvark

Comment 5

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/ab9df6cf0f4f

Comment 7

[tgn-ff]

I can verify the fix on Nightly with Build ID 20190913092859.