690356 - Lower half of html5 youtube videos flickers in full screen

Status: RESOLVED DUPLICATE of bug 697647

(Core :: Graphics, defect)

Description

[Virgil Dicu [:virgil] [QA]]

Mozilla/5.0 (X11; Linux x86_64; rv:10.0a1) Gecko/20110929 Firefox/10.0a1
Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20100101 Firefox/8.0

Found on Firefox 8 Beta 1. Issue only reproducible on linux.

When running a html5 video in youtube in Full screen, the lower half of the video flickers constantly.

STR:

1. Launch Firefox.
2. Join the HTML5 trial at http://www.youtube.com/html5
3. Load and play http://www.youtube.com/watch?v=Q-73zYoUsd4
4. Enter full screen.

Actual result: the screen constantly flickers in the lower half of the screen.

Expected result: the video should be playing smoothly.

Regression range:

Last good nightly: 2011-08-12
First bad nightly: 2011-08-13

Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=f262c389193e&tochange=9698a1031317

Comment 1

[Jeff Muizelaar [:jrmuizel]]

I think the best candidate for causing these regressions are these:

Robert O'Callahan — Bug 657401. Ensure that when our double-buffering logic expects layers to clip to their visible regions, we actually do. r=tnikkel

Robert O'Callahan — Bug 386444. Pass the correct current scroll position as the default value to GetCoordAttribute. r=dbaron

Robert O'Callahan — Bug 677095. Compute reasonable destination alpha values with component-alpha blending in D3D10. r=bas

Comment 2

[Timothy Nikkel (:tnikkel)]

Looks like it is caused by

d63d5764397c Robert O'Callahan — Bug 657401. Ensure that when our double-buffering logic expects layers to clip to their visible regions, we actually do. r=tnikkel

Comment 3

[[:Cww]]

Tracking for 8 just because we want to see if we get lots of support requests after release; there's no time for fixing this bug before release in 2.5 weeks.

Tracking for 9 to try to get some action on this.

Comment 4

[LegNeato]

Any news on this?

Comment 5

[Virgil Dicu [:virgil] [QA]]

Note: A stripe in the lower half of the screen flickers while in normal mode too in html5 for some videos. This occurs pretty rarely. Managed to find 2 videos with this issue out of 10 videos played.

Example: http://www.youtube.com/watch?v=Nnpil_pRUiw

Comment 6

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Dup of (fixed) bug 697647?

Comment 7

[Virgil Dicu [:virgil] [QA]]

Yes, the issue no longer occurs after the fix landed there.

Comment 8

[LegNeato]

Tracking original.